List of device bandwidths: Wikis

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From Wikipedia, the free encyclopedia

This is a list of device bandwidths, or the physical layer information rates more properly known as net bit rates or 'useful' bit rates, at which digital devices can communicate over various kinds of buses and networks. The distinction between a bus (internal to a box and usually relying on many parallel wires) and a communications network cable (external, between boxes and rarely relying on more than four wires) can be arbitrary and many device interfaces or protocols (like SATA, USB, SCSI, PCI and a few variants of Ethernet) are used both inside a many-device box like a PC or one-device-box such as a hard drive enclosure. Accordingly this page lists both the internal ribbon and external communications cable standards together in one sortable table.

Contents

Factors limiting actual performance, criteria for real decisions

Most of the listed speeds are theoretical maximum throughput measures; in practice, the actual effective throughput are almost inevitably lower in proportion to the load from other devices (network/bus contention), interframe gap and other overhead in data link layer protocols, etc. The maximum goodput, for example the file transfer rate, may be even lower due to higher layer protocol overhead, and due to data packet retransmissions caused by line noise or interference such as crosstalk, or lost packets in congested intermediate network nodes. All protocols lose something, and the more robust ones that deal resiliently with very many failure situations tend to lose more maximum throughput to get higher total long term rates.

Device interfaces where one bus transfers data via another will be limited to the throughput of the slowest interface, at best. For instance SATA 6G controllers on one PCIe 5G channel will be limited to the 5G speed and have to employ more channels to get around this problem. Early implementations of new protocols very often have this kind of problem. The physical phenomena on which the device relies (such as spinning platters in a hard drive) will also impose limits, for instance no spinning platter shipping in 2009 saturates SATA3 so moving from this 3gbps interface to USB3 at 4.8gbps for one spinning drive will result in no increase in realized transfer rate. It might however be sensible for other reasons such as standardizing on a USB-only storage subsystem or exploiting USB's one-cable power.

Contention in a wireless or noisy spectrum where the physical medium is entirely out of the control of those who specify the protocol requires measures that also use up throughput. Wireless devices, BPL and modems may produce a higher line rate or gross bit rate, due to error-correcting codes and other physical layer overhead. It is extremely common for throughput to be far less than half of theoretical maximum though the more recent technologies (notably BPL) employ pre-emptive spectrum analysis to avoid this and so have much more potential to reach actual gigabit speeds in practice than prior modems.

Another factor reducing throughput is deliberate policy decisions, made for contractual or risk management or aggregation saturation or marketing reasons. Examples are Internet service providers rate limiting and bandwidth throttling and assignment of IPs to groups so as to minimize rather than maximize the throughput available to every user, but maximize the number of users that can be supported on one backbone.

Also, often, chips are not available to implement the fastest speeeds. AMD for instance does not support the 32-bit HyperTransport interface on any CPU it shipped as of end 2009, and WiMax service providers in the US are typically supporting only up to 4mbps as of end of 2009.

Choosing service providers or interfaces based on theoretical maxima is unwise, especially for commercial needs. Large scale data centers for instance would be more concerned with price per port to support the interface, wattage and heat considerations, and total cost of the solution. Scalability of the interface (some protocols such as SCSI and Ethernet now operate many orders of magnitude faster than when originally deployed) is one major factor as it prevents costly shifts to technologies that are not backward-compatible, often involuntarily or by surprise when a vendor abandons support for a proprietary system.

Conventions

By convention, bus and network speeds are denoted either in bit/s (bits per second) or byte/s (bytes per second). In general, parallel interfaces are quoted in byte/s and serial in bit/s. The more commonly used is shown below in bold type.

On devices like modems, bytes may be more than 8 bits long because they may be individually padded out with additional start and stop bits; the figures below will reflect this. Where channels use line codes (such as Ethernet, Serial ATA and PCI Express), quoted speeds are for the decoded signal.

The figures below are simplex speeds, which may conflict with the duplex speeds vendors sometimes use in promotional materials. Where two values are listed, the first value is the downstream rate and the second value is the upstream rate.

All quoted figures are in metric decimal units, where:

  • 1 byte = 8 bits
  • 1 kbit = 1,000 bits
  • 1 Mbit = 1,000,000 bits
  • 1 Gbit = 1,000,000,000 bits
  • 1 kB = 1,000 bytes
  • 1 MB = 1,000,000 bytes
  • 1 GB = 1,000,000,000 bytes
  • 1 TB = 1,000,000,000,000 bytes

Bandwidths

The figures below are grouped by network or bus type, then sorted within each group from lowest to highest bandwidth; gray shading indicates a lack of known implementations.

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TTY/Teletypewriter or Telecommunications Device for the Deaf (TDD)

Device Speed (bit/s) Speed (characters/s)
TTY (V.18) &0000000000000045.45450045.4545 bit/s 6 characters/s[1]
TTY (V.18) &0000000000000050.00000050 bit/s 6.6 characters/s
NTSC Line 21 Closed Captioning &0000000000001000.0000001 kbit/s ~100 characters/s

Modems/broadband connections

All modems are assumed to be in serial operation with 1 start bit, 8 data bits, no parity, and 1 stop bit (2 stop bits for 110-baud modems). Therefore, a total of 10 bits (11 bits for 110-baud modems) are needed to transmit each 8-bit byte. The "bytes" column reflects the net data transfer rate after the protocol overhead has been removed.

Device Speed (bit/s) Speed (byte/s) Inception
Morse code (skilled operator) &0000000000000005.0000000.005 kbit/s &0000000000000008.0000000.001 kB/s (~40 wpm) 1844
Modem 110 baud (symbols / second) &0000000000000110.0000000.11 kbit/s &0000000000000080.0000000.010 kB/s (~10 cps)[2] 1956?
Modem 300 (300 baud) (Bell 103 or V.21) &0000000000000300.0000000.3 kbit/s &0000000000000240.0000000.03 kB/s (~30 cps)[2] 1962 [3]
Modem 1200 (600 baud) (Bell 212A or V.22) &0000000000001200.0000001.2 kbit/s &0000000000000960.0000000.12 kB/s (~120 cps)[2] 1976
Modem 1200/75 (600 baud) (V.23) &0000000000001200.0000001.2/0.075 kbit/s &0000000000001200.0000000.12/0.0075 kB/s (~120 cps)[2]
Modem 2400 (600 baud) (V.22bis) &0000000000002400.0000002.4 kbit/s &0000000000001920.0000000.24 kB/s[2]
Modem 4800 (1600 baud) (V.27ter) &0000000000004800.0000004.8 kbit/s &0000000000003840.0000000.48 kB/s[2]
Modem 9600 (2400 baud) (V.32) &0000000000009600.0000009.6 kbit/s &0000000000007680.0000000.96 kB/s[2] 1989[3]
Modem 14.4 (2400 baud) (V.32bis) &0000000000014400.00000014.4 kbit/s &0000000000011200.0000001.4 kB/s[2] 1991[3]
Modem 28.8 (3200 baud) (V.34-1994) &0000000000028800.00000028.8 kbit/s &0000000000023200.0000002.9 kB/s[2] 1994[3]
Modem 33.6 (3429 baud) (V.34-1998) &0000000000033600.00000033.6 kbit/s &0000000000026400.0000003.3 kB/s[2] 1996[3]
Modem 56k (8000/3429 baud) (V.90) &0000000000056000.00000056.0/33.6 kbit/s[4] &0000000000056000.0000005.6/3.3 kB/s 1998
Modem 56k (8000/8000 baud) (V.92) &0000000000056001.00000056.0/48.0 kbit/s[4] &0000000000056001.0000005.6/4.8 kB/s 1999
Hardware compression (variable) (V.90/V.42bis) &0000000000056002.00000056.0-220.0 kbit/s &0000000000056002.0000005.6-22 kB/s
Hardware compression (variable) (V.92/V.44) &0000000000056003.00000056.0-320.0 kbit/s &0000000000056003.0000005.6-32 kB/s
ISDN Basic Rate Interface (single/dual channel) data &0000000000064000.00000064/128 kbit/s[5] &0000000000064000.0000008/16 kB/s 1986 [6]
IDSL &0000000000144000.000000144 kbit/s &0000000000144000.00000018 kB/s 2000 [7]
HDSL ITU G.991.1 &0000000001544000.0000001,544 kbit/s &0000000001544000.000000193 kB/s 1998 [8]
MSDSL &0000000002000000.0000002,000 kbit/s &0000000002000000.000000250 kB/s
SDSL &0000000002320000.0000002,320 kbit/s &0000000002320000.000000290 kB/s
ADSL (typical)[9] &0000000003000000.0000003,000/768 kbit/s &0000000003000000.000000375/96 kB/s 1998
SHDSL ITU G.991.2 &0000000005690000.0000005,690 kbit/s &0000000005688000.000000711 kB/s 2001
ADSL &0000000008192000.0000008,192/1,024 kbit/s &0000000008192000.0000001,024/128 kB/s 1998
ADSL (G.DMT) &0000000012288000.00000012,288/1,333 kbit/s &0000000012288000.0000001,536/166 kB/s 1999
ADSL2 &0000000012288001.00000012,288/3,584 kbit/s &0000000012288001.0000001,536/448 kB/s 2002
ADSL2+ &0000000024576000.00000024,576/3,584 kbit/s &0000000024576000.0000003,072/448 kB/s 2003
DOCSIS v1.0[10] (Cable modem) &0000000038000000.00000038,000/9,000 kbit/s &0000000038000000.0000004750/1,125 kB/s 1997
DOCSIS v2.0[11] (Cable modem) &0000000038000001.00000038,000/27,000 kbit/s &0000000038000001.0000004,750/3,375 kB/s 2001
FiOS fiber optic service (typical) &0000000050000000.00000050,000/20,000 kbit/s &0000000050000000.0000006,250/2,500 kB/s
DOCSIS v3.0[12] (Cable modem) &0000000160000000.000000160,000/120,000 kbit/s &0000000160000000.00000020,000/15,000 kB/s 2006
Uni-DSL &0000000200000000.000000200,000 kbit/s &0000000200000000.00000025,000 kB/s
VDSL ITU G.993.1 &0000000200000000.000000200,000 kbit/s &0000000200000000.00000025,000 kB/s 2001
VDSL2 ITU G.993.2 &0000000250000000.000000250,000 kbit/s &0000000250000000.00000031,250 kB/s 2006
BPON (G.983) fiber optic service &0000000622000000.000000622,000/155,000 kbit/s &0000000622000000.00000077,700/19,300 kB/s 2005[13]
GPON (G.984) fiber optic service &0000002488000000.0000002,488,000/1,244,000 kbit/s &0000002488000000.000000311,000/155,500 kB/s 2008[14]

Mobile telephone interfaces

Device Speed (bit/s) Speed (byte/s)
GSM CSD &0000000000014400.00000014.4 kbit/s &0000000000014400.0000001.8 kB/s
HSCSD &0000000000057600.00000057.6/14.4 kbit/s &0000000000057600.0000005.4/1.8 kB/s
GPRS &0000000000057601.00000057.6/28.8 kbit/s &0000000000057601.0000007.2/3.6 kB/s
WiDEN &0000000000100000.000000100 kbit/s &0000000000100000.00000012.5 kB/s
CDMA2000 1xRTT &0000000000153000.000000153 kbit/s &0000000000144000.00000018 kB/s
EDGE (type 1 MS) &0000000000236800.000000236.8 kbit/s &0000000000236800.00000029.6 kB/s
UMTS &0000000000384000.000000384 kbit/s &0000000000384000.00000048 kB/s
EDGE (type 2 MS) &0000000000473600.000000473.6 kbit/s &0000000000473600.00000059.2 kB/s
EDGE Evolution (type 1 MS) &0000000001184000.0000001,184/474 kbit/s &0000000001184000.000000148/59 kB/s
EDGE Evolution (type 2 MS) &0000000001894000.0000001,894/947 kbit/s &0000000001894000.000000237/118 kB/s
1xEV-DO Rev. 0 &0000000002457000.0000002,457/153 kbit/s &0000000002457000.000000307.2/19 kB/s
1xEV-DO Rev. A &0000000003100000.0000003,100/1,800 kbit/s &0000000003100000.000000397/230 kB/s
3xEV-DO Rev. B &0000000009300000.0000009,300/5,400 kbit/s &0000000009300000.0000001,162/675 kB/s
HSDPA/HSUPA &0000000014400000.00000014,400/5760 kbit/s &0000000014400000.0000001,800/720 kB/s
4xEV-DO Enhancements (2X2 MIMO) &0000000034400000.00000034,400/12,400 kbit/s &0000000034400000.0000004,300/1,550 kB/s
HSPA+ (2X2 MIMO) &0000000042000000.00000042,000/11,500 kbit/s &0000000042000000.0000005,250/1,437 kB/s
15xEV-DO Rev. B &0000000073500000.00000073,500/27,000 kbit/s &0000000073500000.0000009,200/3,375 kB/s
UMB (2X2 MIMO) &0000000140000000.000000140,000/34,000 kbit/s &0000000140000000.00000017,500/4,250 kB/s
LTE (2X2 MIMO) &0000000173000000.000000173,000/58,000 kbit/s &0000000173000000.00000021,625/7,250 kB/s
UMB (4X4 MIMO) &0000000280000000.000000280,000/68,000 kbit/s &0000000280000000.00000035,000/8,500 kB/s
EV-DO Rev. C &0000000280000001.000000280,000/75,000 kbit/s &0000000280000001.00000035,000/9,000 kB/s
LTE (4X4 MIMO) &0000000326000000.000000326,000/86,000 kbit/s &0000000326000000.00000040,750/10,750 kB/s
4G (4X4 MIMO) &0000000100000000.000000100,000/50,000 kbit/s &0000000100000000.00000012,500/6,250 kB/s

Wide area networks

Device Speed (bit/s) Speed (byte/s)
DS0 &0000000000064000.0000000.064 Mbit/s &0000000000064000.0000000.008 MB/s
G.Lite (aka ADSL Lite) &0000000000001536.0000001.536/0.512 Mbit/s &0000000000001536.0000000.192/0.064 MB/s
DS1/T1 (and ISDN Primary Rate Interface) &0000000001544000.0000001.544 Mbit/s &0000000001536000.0000000.192 MB/s
E1 (and ISDN Primary Rate Interface) &0000000002048000.0000002.048 Mbit/s &0000000002048000.0000000.256 MB/s
G.SHDSL &0000000002304000.0000002.304 Mbit/s &0000000002304000.0000000.288 MB/s
LR-VDSL2 (4 to 5 km [long-]range) (symmetry optional) &0000000004000000.0000004 Mbit/s &0000000004096000.0000000.512 MB/s
SDSL[15] &0000000002320000.0000002.32 Mbit/s &0000000002320000.0000000.29 MB/s
T2 &0000000006312000.0000006.312 Mbit/s &0000000006312000.0000000.789 MB/s
ADSL[16] &0000000000008000.0000008.0/1.024 Mbit/s &0000000000008000.0000001/0.128 MB/s
E2 &0000000008448000.0000008.448 Mbit/s &0000000008448000.0000001.056 MB/s
ADSL2 &0000000000012000.00000012/3.5 Mbit/s &0000000000012000.0000001.5/0.448 MB/s
Satellite Internet[17] &0000000000016000.00000016/1 Mbit/s &0000000000016000.0000002.0/0.128 MB/s
ADSL2+ &0000000000024000.00000024/3.5 Mbit/s &0000000000024000.0000003.0/0.448 MB/s
E3 &0000000034368000.00000034.368 Mbit/s &0000000034368000.0000004.296 MB/s
DOCSIS v1.0 (Cable modem)[10] &0000000000038000.00000038.0/10.0 Mbit/s &0000000000038000.0000004.75/1.25 MB/s
DOCSIS v2.0 (Cable modem)[11] &0000000000040000.00000040/30 Mbit/s &0000000000040000.0000005.0/3.75 MB/s
DS3/T3 ('45 Meg') &0000000044736000.00000044.736 Mbit/s &0000000044740000.0000005.5925 MB/s
STS-1/EC-1/OC-1/STM-0 &0000000051840000.00000051.84 Mbit/s &0000000051840000.0000006.48 MB/s
VDSL (symmetry optional) &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
DOCSIS v3.0 (Cable modem)[12] &0000000000160000.000000160/120 Mbit/s &0000000000160000.00000020/15 MB/s
OC-3/STM-1 &0000000155520000.000000155.52 Mbit/s &0000000155520000.00000019.44 MB/s
VDSL2 (symmetry optional) &0000000250000000.000000250 Mbit/s &0000000250000000.00000031.25 MB/s
T4 &0000000274176000.000000274.176 Mbit/s &0000000274176000.00000034.272 MB/s
T5 &0000000400352000.000000400.352 Mbit/s &0000000400352000.00000050.044 MB/s
OC-9 &0000000466560000.000000466.56 Mbit/s &0000000466560000.00000058.32 MB/s
OC-12/STM-4 &0000000622080000.000000622.08 Mbit/s &0000000622080000.00000077.76 MB/s
OC-18 &0000000933120000.000000933.12 Mbit/s &0000000933120000.000000116.64 MB/s
OC-24 &0000001244000000.0000001,244 Mbit/s &0000001244000000.000000155.5 MB/s
OC-36 &0000001900000000.0000001,900 Mbit/s &0000001900000000.000000237.5 MB/s
OC-48/STM-16 &0000002488000000.0000002,488 Mbit/s &0000002488320000.000000311.04 MB/s
OC-96 &0000004976000000.0000004,976 Mbit/s &0000004976640000.000000622.08 MB/s
OC-192/STM-64 &0000009953000000.0000009,953 Mbit/s &0000009952000000.0000001,244 MB/s
10 Gigabit Ethernet WAN PHY &0000009953000000.0000009,953 Mbit/s &0000009952000000.0000001,244 MB/s
10 Gigabit Ethernet LAN PHY &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
OC-256 &0000013271000000.00000013,271 Mbit/s &0000013272000000.0000001,659 MB/s
OC-768/STM-256 &0000039813000000.00000039,813 Mbit/s &0000039808000000.0000004,976 MB/s
OC-1536/STM-512 &0000079626000000.00000079,626 Mbit/s &0000079624000000.0000009,953 MB/s
OC-3072/STM-1024 &0000159252000000.000000159,252 Mbit/s &0000159256000000.00000019,907 MB/s

Local area networks

Device Speed (bit/s) Speed (byte/s)
LocalTalk &0000000000230000.0000000.230 Mbit/s &0000000000230400.0000000.0288 MB/s
Econet &0000000000800000.0000000.800 Mbit/s &0000000000800000.0000000.1 MB/s
PC-Network &0000000002000000.0000002 Mbit/s &0000000002000000.0000000.25 MB/s
ARCNET (Standard) &0000000002500000.0000002.5 Mbit/s &0000000002500000.0000000.3125 MB/s
Ethernet Experimental &0000000003000000.0000003 Mbit/s &0000000003000000.0000000.375 MB/s
Token Ring (Original) &0000000004000000.0000004 Mbit/s &0000000004000000.0000000.5 MB/s
Ethernet (10base-X) &0000000010000000.00000010 Mbit/s &0000000009280000.0000001.16 MB/s
Token Ring (Later) &0000000016000000.00000016 Mbit/s &0000000016000000.0000002 MB/s
ARCnet Plus &0000000020000000.00000020 Mbit/s &0000000020000000.0000002.5 MB/s
Token Ring IEEE 802.5t &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
Fast Ethernet (100base-X) &0000000100000000.000000100 Mbit/s &0000000092800000.00000011.6 MB/s
FDDI &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
MoCA 1.0[18] &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
MoCA 1.1[18] &0000000175000000.000000175 Mbit/s &0000000175000000.00000021.875 MB/s
FireWire (IEEE 1394) 400[19][20] &0000000393216000.000000393.216 Mbit/s &0000000393216000.00000049.152 MB/s
HIPPI &0000000800000000.000000800 Mbit/s &0000000800000000.000000100 MB/s
Token Ring IEEE 802.5v &0000001000000000.0000001,000 Mbit/s &0000001000000000.000000125 MB/s
Gigabit Ethernet (1000base-X) &0000001000000000.0000001,000 Mbit/s &0000001000000000.000000125 MB/s
Myrinet 2000 &0000002000000000.0000002,000 Mbit/s &0000002000000000.000000250 MB/s
Infiniband SDR 1X[21] &0000002000000000.0000002,000 Mbit/s &0000002000000000.000000250 MB/s
Quadrics QsNetI &0000003600000000.0000003,600 Mbit/s &0000003600000000.000000450 MB/s
Infiniband DDR 1X[21] &0000004000000000.0000004,000 Mbit/s &0000004000000000.000000500 MB/s
Infiniband QDR 1X[21] &0000008000000000.0000008,000 Mbit/s &0000008000000000.0000001,000 MB/s
Infiniband SDR 4X[21] &0000008000000000.0000008,000 Mbit/s &0000008000000000.0000001,000 MB/s
Quadrics QsNetII &0000008000000000.0000008,000 Mbit/s &0000008000000000.0000001,000 MB/s
10 Gigabit Ethernet (10Gbase-X) &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
Myri 10G &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
Infiniband DDR 4X[21] &0000016000000000.00000016,000 Mbit/s &0000016000000000.0000002,000 MB/s
Scalable Coherent Interface (SCI) Dual Channel SCI, x8 PCIe &0000020000000000.00000020,000 Mbit/s &0000020000000000.0000002,500 MB/s
Infiniband SDR 12X[21] &0000024000000000.00000024,000 Mbit/s &0000024000000000.0000003,000 MB/s
Infiniband QDR 4X[21] &0000032000000000.00000032,000 Mbit/s &0000032000000000.0000004,000 MB/s
Infiniband DDR 12X[21] &0000048000000000.00000048,000 Mbit/s &0000048000000000.0000006,000 MB/s
Infiniband QDR 12X[21] &0000096000000000.00000096,000 Mbit/s &0000096000000000.00000012,000 MB/s
100 Gigabit Ethernet (100Gbase-X) &0000100000000000.000000100,000 Mbit/s &0000100000000000.00000012,500 MB/s

Wireless networks

802.11 networks in infrastucture mode are half-duplex; all stations share the medium. In access point (infrastucture) mode, all traffic has to pass through the AP (Access Point). Thus, two stations on the same AP which are communicating with each other must have each and every frame transmitted twice: from the sender to the access point, then from the access point to the receiver. This approximately halves the effective bandwidth. In ad hoc mode devices communicate directly (like with a crossover cable) rather than to the network(like through a hub), losing some security functionality.

Device Speed (bit/s) Speed (byte/s)
802.11 (legacy) 0.125 &0000000002000000.0000002.0 Mbit/s &0000000002000000.0000000.25 MB/s
RONJA free space optical wireless (full duplex, so each way) &0000000010000000.00000010.0 Mbit/s &0000000010000000.0000001.25 MB/s
802.11b DSSS 0.125 &0000000011000000.00000011.0 Mbit/s &0000000011000000.0000001.375 MB/s
802.11b+ (TI-proprietary extension to 802.11b, non-IEEE standard[22][23]) DSSS 0.125 &0000000044000000.00000044.0 Mbit/s &0000000044000000.0000005.5 MB/s
802.11a 0.75 &0000000054000000.00000054.0 Mbit/s &0000000054000000.0000006.75 MB/s
802.11g OFDM 0.125 &0000000054000000.00000054.0 Mbit/s &0000000054000000.0000006.75 MB/s
802.16 (WiMAX) &0000000070000000.00000070.0 Mbit/s &0000000070000000.0000008.75 MB/s
802.11g with Super G (Atheros-proprietary extension to 802.11g) DSSS 0.125 &0000000108000000.000000108.0 Mbit/s &0000000108000000.00000013.5 MB/s
802.11g with 125HSM (a.k.a. Afterburner, Broadcom-proprietary extension to 802.11g) &0000000125000000.000000125.0 Mbit/s &0000000125000000.00000015.625 MB/s
802.11g with Nitro (Conexant-proprietary extension to 802.11g) &0000000140000000.000000140.0 Mbit/s &0000000140000000.00000017.5 MB/s
802.11n &0000000000300000.000000Varies, 300.0 Mbit/s Max &0000000000300000.000000Varies, 37.5 MB/s Max

Wireless personal area networks

Device Speed (bit/s) Speed (byte/s)
IrDA-Control &0000000000072000.00000072 kbit/s &0000000000072000.0000009 kB/s
IrDA-SIR &0000000000115200.000000115.2 kbit/s &0000000000112000.00000014 kB/s
802.15.4 (2.4 GHz) &0000000000250000.000000250 kbit/s &0000000000250000.00000031.25 kB/s
Bluetooth 1.1 &0000000001000000.0000001,000 kbit/s &0000000001000000.000000125 kB/s
Bluetooth 2.0+EDR &0000000003000000.0000003,000 kbit/s &0000000003000000.000000375 kB/s
IrDA-FIR &0000000004000000.0000004,000 kbit/s &0000000004080000.000000510 kB/s
IrDA-VFIR &0000000016000000.00000016,000 kbit/s &0000000016000000.0000002,000 kB/s
IrDA-UFIR &0000000100000000.000000100,000 kbit/s &0000000100000000.00000012,500 kB/s
Bluetooth 3.0 &0000000024000000.00000024,000 kbit/s &0000000024000000.0000003,000 kB/s
WUSB-UWB &0000000480000000.000000480,000 kbit/s &0000000480000000.00000060,000 kB/s

Computer buses

Device Speed (bit/s) Speed (byte/s)
I2c &0000000003400000.0000003.4 Mbit/s &0000000003400000.000000425 kB/s
ISA 8-Bit/4.77 MHz[24] &0000000009600000.0000009.6 Mbit/s &0000000009600000.0000001.2 MB/s
Zorro II 16-Bit/7.14 MHz[25] &0000000028560000.00000028.56 Mbit/s &0000000028480000.0000003.56 MB/s
ISA 16-Bit/8.33 MHz[24] &0000000042400000.00000042.4 Mbit/s &0000000042400000.0000005.3 MB/s
Low Pin Count &0000000133330000.000000133.33 Mbit/s &0000000133360000.00000016.67 MB/s
HP-Precision Bus &0000000184000000.000000184 Mbit/s &0000000184000000.00000023 MB/s
EISA 8-16-32bits/8.33 MHz &0000000320000000.000000320 Mbit/s &0000000256000000.00000032 MB/s
VME64 32-64bits &0000000400000000.000000400 Mbit/s &0000000320000000.00000040 MB/s
NuBus 10 MHz &0000000400000000.000000400 Mbit/s &0000000320000000.00000040 MB/s
DEC TURBOchannel 32-bit/12.5 MHz &0000000400000000.000000400 Mbit/s &0000000400000000.00000050 MB/s
MCA 16-32bits/10 MHz &0000000660000000.000000660 Mbit/s &0000000528000000.00000066 MB/s
NuBus90 20 MHz &0000000800000000.000000800 Mbit/s &0000000640000000.00000080 MB/s
Sbus 32-bit/25 MHz &0000000800000000.000000800 Mbit/s &0000000800000000.000000100 MB/s
DEC TURBOchannel 32-bit/25 MHz &0000000800000000.000000800 Mbit/s &0000000800000000.000000100 MB/s
VLB 32-bit/33 MHz &0000001067000000.0000001,067 Mbit/s &0000001066640000.000000133.33 MB/s
PCI 32-bit/33 MHz &0000001067000000.0000001,067 Mbit/s &0000001066640000.000000133.33 MB/s
HP GSC-1X &0000001136000000.0000001,136 Mbit/s &0000001136000000.000000142 MB/s
Zorro III[26][27][28] 32-Bit/37.5 MHz &0000001200000000.0000001,200 Mbit/s &0000001200000000.000000150 MB/s
Sbus 64-bit/25 MHz &0000001600000000.0000001,600 Mbit/s &0000001600000000.000000200 MB/s
PCI Express 1.0 (x1 link)[29] &0000002000000000.0000002,000 Mbit/s &0000002000000000.000000250 MB/s
HP GSC-2X &0000002048000000.0000002,048 Mbit/s &0000002048000000.000000256 MB/s
PCI 64-bit/33 MHz &0000002133000000.0000002,133 Mbit/s &0000002133600000.000000266.7 MB/s
PCI 32-bit/66 MHz &0000002133000000.0000002,133 Mbit/s &0000002133600000.000000266.7 MB/s
AGP 1x &0000002133000000.0000002,133 Mbit/s &0000002133600000.000000266.7 MB/s
HIO bus &0000002560000000.0000002,560 Mbit/s &0000002560000000.000000320 MB/s
PCI Express 1.0 (x2 link)[29] &0000004000000000.0000004,000 Mbit/s &0000004000000000.000000500 MB/s
AGP 2x &0000004266000000.0000004,266 Mbit/s &0000004266400000.000000533.3 MB/s
PCI 64-bit/66 MHz &0000004266000000.0000004,266 Mbit/s &0000004266400000.000000533.3 MB/s
PCI-X DDR 16-bit &0000004266000000.0000004,266 Mbit/s &0000004266400000.000000533.3 MB/s
PCI 64-bit/100 MHz &0000006399000000.0000006,399 Mbit/s &0000006400000000.000000800 MB/s
RapidIO (1 lane) &0000006500000000.0000006,500 Mbit/s &0000006500000000.000000812.5 MB/s
PCI Express 1.0 (x4 link) &0000008000000000.0000008,000 Mbit/s &0000008000000000.0000001,000 MB/s
AGP 4x &0000008532999999.9999998,533 Mbit/s &0000008536000000.0000001,067 MB/s
PCI-X 133 &0000008532999999.9999998,533 Mbit/s &0000008536000000.0000001,067 MB/s
PCI-X QDR 16-bit &0000008532999999.9999998,533 Mbit/s &0000008536000000.0000001,067 MB/s
InfiniBand single 4X[21] &0000008000000000.0000008,000 Mbit/s &0000008000000000.0000001,000 MB/s
UPA &0000015360000000.00000015,360 Mbit/s &0000015360000000.0000001,920 MB/s
PCI Express 1.0 (x8 link)[29] &0000016000000000.00000016,000 Mbit/s &0000016000000000.0000002,000 MB/s
AGP 8x &0000017065999999.99999817,066 Mbit/s &0000017064000000.0000002,133 MB/s
PCI-X DDR &0000017065999999.99999817,066 Mbit/s &0000017064000000.0000002,133 MB/s
HyperTransport (800 MHz, 16-pair) &0000025600000000.00000025,600 Mbit/s &0000025600000000.0000003,200 MB/s
HyperTransport (1 GHz, 16-pair) &0000032000000000.00000032,000 Mbit/s &0000032000000000.0000004,000 MB/s
PCI Express 1.0 (x16 link)[29] &0000032000000000.00000032,000 Mbit/s &0000032000000000.0000004,000 MB/s
PCI Express 2.0 (x8 link)[30] &0000032000000000.00000032,000 Mbit/s &0000032000000000.0000004,000 MB/s
PCI-X QDR &0000034133000000.00000034,133 Mbit/s &0000034128000000.0000004,266 MB/s
AGP 8x 64-bit &0000034133000000.00000034,133 Mbit/s &0000034128000000.0000004,266 MB/s
PCI Express (x32 link)[29] &0000064000000000.00000064,000 Mbit/s &0000064000000000.0000008,000 MB/s
PCI Express 2.0 (x16 link)[30] &0000064000000000.00000064,000 Mbit/s &0000064000000000.0000008,000 MB/s
PCI Express 2.0 (x32 link)[30] &0000128000000000.000000128,000 Mbit/s &0000128000000000.00000016,000 MB/s
QuickPath Interconnect (2.4 GHz) &0000153600000000.000000153,600 Mbit/s &0000153600000000.00000019,200 MB/s
HyperTransport (2.8 GHz, 32-pair) &0000179200000000.000000179,200 Mbit/s &0000179200000000.00000022,400 MB/s
QuickPath Interconnect (3.2 GHz) &0000204800000000.000000204,800 Mbit/s &0000204800000000.00000025,600 MB/s
HyperTransport 3.1 (3.2 GHz, 32-pair) &0000409600000000.000000409,600 Mbit/s &0000409600000000.00000051,200 MB/s

Portable

Device Speed (bit/s) Speed (byte/s)
PC Card 16 bit 255ns Byte mode &0000000031360000.00000031.36 Mbit/s &0000000031360000.0000003.92 MB/s
PC Card 16 bit 255ns Word mode &0000000062720000.00000062.72 Mbit/s &0000000062720000.0000007.84 MB/s
PC Card 16 bit 100ns Byte mode &0000000080000000.00000080 Mbit/s &0000000080000000.00000010 MB/s
PC Card 16 bit 100ns Word mode &0000000160000000.000000160 Mbit/s &0000000160000000.00000020 MB/s
PC Card 32 bit (CardBus) Byte mode &0000000267000000.000000267 Mbit/s &0000000266640000.00000033.33 MB/s
ExpressCard 1.2 USB 2.0 mode &0000000480000000.000000480 Mbit/s &0000000480000000.00000060 MB/s
PC Card 32 bit (CardBus) Word mode &0000000533000000.000000533 Mbit/s &0000000533280000.00000066.66 MB/s
PC Card 32 bit (CardBus) DWord mode &0000001067000000.0000001,067 Mbit/s &0000001066640000.000000133.33 MB/s
ExpressCard 1.2 PCI Express mode &0000002500000000.0000002,500 Mbit/s &0000002500000000.000000312.5 MB/s
ExpressCard 2.0 USB 3.0 mode &0000004800000000.0000004,800 Mbit/s &0000004800000000.000000600 MB/s
ExpressCard 2.0 PCI Express mode &0000005000000000.0000005,000 Mbit/s &0000005000000000.000000625 MB/s

Storage

Device Speed (bit/s) Speed (byte/s)
PC Floppy Disk Controller (1.2MB / 1.44MB) &0000000000500000.0000000.5 Mbit/s &0000000000496000.0000000.062 MB/s
CD Controller (1x) &0000000001171875.0000001.171875 Mbit/s &0000000001171875.0000000.146484375 MB/s
MFM &0000000005000000.0000005 Mbit/s &0000000005000000.0000000.625 MB/s
RLL &0000000007500000.0000007.5 Mbit/s &0000000007500000.0000000.9375 MB/s
DVD Controller (1x) &0000000011100000.00000011.1 Mbit/s &0000000010560000.0000001.32 MB/s
ESDI &0000000024000000.00000024 Mbit/s &0000000024000000.0000003 MB/s
ATA PIO Mode 0 &0000000026400000.00000026.4 Mbit/s &0000000026400000.0000003.3 MB/s
HD DVD Controller (1x) &0000000036000000.00000036 Mbit/s &0000000036000000.0000004.5 MB/s
Blu-ray Controller (1x) &0000000036000000.00000036 Mbit/s &0000000036000000.0000004.5 MB/s
SCSI (Narrow SCSI) (5 MHz)[31] &0000000040000000.00000040 Mbit/s &0000000040000000.0000005 MB/s
ATA PIO Mode 1 &0000000041600000.00000041.6 Mbit/s &0000000041600000.0000005.2 MB/s
ATA PIO Mode 2 &0000000066400000.00000066.4 Mbit/s &0000000066400000.0000008.3 MB/s
Fast SCSI (8 bits/10 MHz) &0000000080000000.00000080 Mbit/s &0000000080000000.00000010 MB/s
ATA PIO Mode 3 &0000000088800000.00000088.8 Mbit/s &0000000088800000.00000011.1 MB/s
AoE over Fast Ethernet, per path &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
iSCSI over Fast Ethernet &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
ATA PIO Mode 4 &0000000133300000.000000133.3 Mbit/s &0000000133600000.00000016.7 MB/s
Fast Wide SCSI (16 bits/10 MHz) &0000000160000000.000000160 Mbit/s &0000000160000000.00000020 MB/s
Ultra SCSI (Fast-20 SCSI) (8 bits/20 MHz) &0000000160000000.000000160 Mbit/s &0000000160000000.00000020 MB/s
Ultra DMA ATA 33 &0000000264000000.000000264 Mbit/s &0000000264000000.00000033 MB/s
Ultra Wide SCSI (16 bits/20 MHz) &0000000320000000.000000320 Mbit/s &0000000320000000.00000040 MB/s
Ultra-2 SCSI 40 (Fast-40 SCSI) (8 bits/40 MHz) &0000000320000000.000000320 Mbit/s &0000000320000000.00000040 MB/s
Ultra DMA ATA 66 &0000000528000000.000000528 Mbit/s &0000000528000000.00000066 MB/s
Ultra-2 wide SCSI (16 bits/40 MHz) &0000000640000000.000000640 Mbit/s &0000000640000000.00000080 MB/s
Serial Storage Architecture SSA &0000000640000000.000000640 Mbit/s &0000000640000000.00000080 MB/s
Ultra DMA ATA 100 &0000000800000000.000000800 Mbit/s &0000000800000000.000000100 MB/s
Fibre Channel 1GFC (1.0625 GHz)[32] &0000000850000000.000000850 Mbit/s &0000000850000000.000000106.25 MB/s
AoE over Gigabit Ethernet, per path &0000001000000000.0000001,000 Mbit/s &0000001000000000.000000125 MB/s
iSCSI over Gigabit Ethernet &0000001000000000.0000001,000 Mbit/s &0000001000000000.000000125 MB/s
Ultra DMA ATA 133 &0000001064000000.0000001,064 Mbit/s &0000001064000000.000000133 MB/s
Ultra-3 SCSI (Ultra 160 SCSI; Fast-80 Wide SCSI) (16 bits/40 MHz DDR) &0000001280000000.0000001,280 Mbit/s &0000001280000000.000000160 MB/s
Serial ATA (SATA-150)[33] &0000001200000000.0000001,200 Mbit/s &0000001200000000.000000150 MB/s
Fibre Channel 2GFC (2.125 GHz)[32] &0000001700000000.0000001,700 Mbit/s &0000001700000000.000000212.5 MB/s
Serial ATA 2 (SATA-300)[33] &0000002400000000.0000002,400 Mbit/s &0000002400000000.000000300 MB/s
Serial Attached SCSI (SAS)[33] &0000002400000000.0000002,400 Mbit/s &0000002400000000.000000300 MB/s
Ultra-320 SCSI (Ultra4 SCSI) (16 bits/80 MHz DDR) &0000002560000000.0000002,560 Mbit/s &0000002560000000.000000320 MB/s
Fibre Channel 4GFC (4.25 GHz)[32] &0000003400000000.0000003,400 Mbit/s &0000003400000000.000000425 MB/s
Serial ATA 3 (SATA-600)[33] &0000004800000000.0000004,800 Mbit/s &0000004800000000.000000600 MB/s
Serial Attached SCSI (SAS) 2[33] &0000004800000000.0000004,800 Mbit/s &0000004800000000.000000600 MB/s
Ultra-640 SCSI (16 bits/160 MHz DDR) &0000005120000000.0000005,120 Mbit/s &0000005120000000.000000640 MB/s
Fibre Channel 8GFC (8.50 GHz)[32] &0000006800000000.0000006,800 Mbit/s &0000006800000000.000000850 MB/s
AoE over 10GbE, per path &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
iSCSI over 10GbE &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
FCoE over 10GbE &0000010000000000.00000010,000 Mbit/s &0000010000000000.0000001,250 MB/s
iSCSI over InfiniBand 4x &0000040000000000.00000040,000 Mbit/s &0000040000000000.0000005,000 MB/s
iSCSI over 100G Ethernet (hypothetical) &0000100000000000.000000100,000 Mbit/s &0000100000000000.00000012,500 MB/s

Peripheral

Device Speed (bit/s) Speed (byte/s)
Apple Desktop Bus &0000000000010000.00000010.0 kbit/s &0000000000010000.0000001,250 B/s
Serial MIDI &0000000000031250.00000031.25 kbit/s &0000000000031200.0000003.9 kB/s
Serial EIA-232 max. &0000000000230400.000000230.4 kbit/s &0000000000230400.00000028.8 kB/s
Serial DMX512A &0000000000250000.000000250.0 kbit/s &0000000000250000.00000031.25 kB/s
Parallel (Centronics) &0000000001000000.0000001 Mbit/s &0000000001000000.000000125 kB/s
Serial 16550 UART max &0000000001500000.0000001.5 Mbit/s &0000000001500000.000000187.5 kB/s
USB Low Speed (USB 1.0) &0000000001536000.0000001.536 Mbit/s &0000000001536000.000000192 kB/s
Serial UART max &0000000002764800.0000002.7648 Mbit/s &0000000002764800.000000345.6 kB/s
GPIB/HPIB (IEEE-488.1) IEEE-488 max &0000000008000000.0000008 Mbit/s &0000000008000000.0000001 MB/s
Serial RS-422 max &0000000010000000.00000010 Mbit/s &0000000010000000.0000001.25 MB/s
USB Full Speed (USB 1.1) &0000000012000000.00000012 Mbit/s &0000000012000000.0000001.5 MB/s
Parallel (Centronics) EPP 2 MHz &0000000016000000.00000016 Mbit/s &0000000016000000.0000002 MB/s
Serial EIA-485 max &0000000035000000.00000035 Mbit/s &0000000028000000.0000003.5 MB/s
GPIB/HPIB (IEEE-488.1-2003) IEEE-488 max &0000000064000000.00000064 Mbit/s &0000000064000000.0000008 MB/s
FireWire (IEEE 1394) 100 &0000000098304000.00000098.304 Mbit/s &0000000098304000.00000012.288 MB/s
FireWire (IEEE 1394) 200 &0000000196608000.000000196.608 Mbit/s &0000000196608000.00000024.576 MB/s
FireWire (IEEE 1394) 400 &0000000393216000.000000393.216 Mbit/s &0000000393216000.00000049.152 MB/s
USB Hi-Speed (USB 2.0) &0000000480000000.000000480 Mbit/s &0000000480000000.00000060 MB/s
FireWire (IEEE 1394b) 800[34] &0000000786432000.000000786.432 Mbit/s &0000000786432000.00000098.304 MB/s
Fibre Channel 1Gb SCSI &0000001062500000.0000001,062.5 Mbit/s &0000000800000000.000000100 MB/s
FireWire (IEEE 1394b) 1600[34] &0000001573000000.0000001,573 Mbit/s &0000001572800000.000000196.6 MB/s
Camera Link Base (single) 24bit 85 MHz[35] &0000002040000000.0000002,040 Mbit/s &0000002088960000.000000261.12 MB/s
Fibre Channel 2Gb SCSI &0000002125000000.0000002,125 Mbit/s &0000001600000000.000000200 MB/s
eSATA (SATA 300) &0000002400000000.0000002,400 Mbit/s &0000002400000000.000000300 MB/s
CoaXPress Base (up and down bidirectional link) &0000003125000000.0000003.125 Gbit/s + &0000000020833000.00000020.833 Mbit/s &0000003120000000.000000390 MB/s
FireWire (IEEE 1394b) 3200[34] &0000003145700000.0000003,145.7 Mbit/s &0000003145728000.000000393.216 MB/s
Fibre Channel 4Gb SCSI &0000004250000000.0000004.25 Gbit/s &0000004250000000.000000531.25 MB/s
USB 3.0 &0000005000000000.0000005 Gbit/s &0000005000000000.000000625 MB/s
Camera Link Full (dual) 72bit 85 MHz[35] &0000006120000000.0000006.12 Gbit/s &0000006120000000.000000765 MB/s
CoaXPress Full (up and down bidirectional link) &0000006250000000.0000006.25 Gbit/s + &0000000020833000.00000020.833 Mbit/s &0000006248000000.000000781 MB/s
External PCI Express x16 &0000032000000000.00000032 Gbit/s &0000032000000000.0000004 GB/s

MAC to PHY

Device Speed (bit/s) Speed (byte/s)
MII (4 Lanes) &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
RMII (2 Lanes) &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
SMII (1 Lane) &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s
GMII (8 Lanes) &0000001000000000.0000001.0 Gbit/s &0000001000000000.000000125 MB/s
RGMII (4 Lanes) &0000001000000000.0000001.0 Gbit/s &0000001000000000.000000125 MB/s
SGMII (2 Lanes) &0000001000000000.0000001.0 Gbit/s &0000001000000000.000000125 MB/s
XGMII (32 Lanes) &0000010000000000.00000010.0 Gbit/s &0000010000000000.0000001.25 GB/s
XAUI (4 Lanes) &0000010000000000.00000010.0 Gbit/s &0000010000000000.0000001.25 GB/s
XLGMII &0000040000000000.00000040.0 Gbit/s &0000040000000000.0000005 GB/s
CGMII &0000100000000000.000000100.0 Gbit/s &0000100000000000.00000012.5 GB/s

PHY to XPDR

Device Speed (bit/s) Speed (byte/s)
XSBI (16 Lanes) &0000000994999999.10000000.995 Gbit/s &0000000992000000.0000000.124 GB/s

Memory Interconnect/RAM buses

Dual channel bandwidths are theoretical maxima and do not always reflect real world performance. In many cases, performance may be closer to single channel operation (half the bandwidth).

Device Speed (bit/s) Speed (byte/s)
FPM DRAM &0000001408000000.0000001.408 Gbit/s &0000001408000000.0000000.176 GB/s
EDO DRAM &0000002112000000.0000002.112 Gbit/s &0000002112000000.0000000.264 GB/s
SPARC MBus &0000002550000000.0000002.55 Gbit/s &0000002560000000.0000000.32 GB/s
PC66 SDRAM &0000004264000000.0000004.264 Gbit/s &0000004264000000.0000000.533 GB/s
PC100 SDRAM &0000006400000000.0000006.4 Gbit/s &0000006400000000.0000000.8 GB/s
HP Runway bus 125 MHz 64-bit &0000006400000000.0000006.4 Gbit/s &0000006400000000.0000000.8 GB/s
PC133 SDRAM &0000008528000000.0000008.528 Gbit/s &0000008528000000.0000001.066 GB/s
PC800 RDRAM (single-channel) &0000012800000000.00000012.8 Gbit/s &0000012800000000.0000001.6 GB/s
PC1600 DDR-SDRAM (single channel) &0000012800000000.00000012.8 Gbit/s &0000012800000000.0000001.6 GB/s
HP Runway bus 125 MHz 64-bit DDR &0000016000000000.00000016 Gbit/s &0000016000000000.0000002 GB/s
PC1066 RDRAM (single-channel) &0000016800000000.00000016.8 Gbit/s &0000016800000000.0000002.1 GB/s
PC2100 DDR-SDRAM (single channel) &0000016800000000.00000016.8 Gbit/s &0000016800000000.0000002.1 GB/s
PC1200 RDRAM (single-channel) &0000019200000000.00000019.2 Gbit/s &0000019200000000.0000002.4 GB/s
PC2700 DDR-SDRAM (single channel) &0000021600000000.00000021.6 Gbit/s &0000021600000000.0000002.7 GB/s
PC800 RDRAM (dual-channel) &0000025600000000.00000025.6 Gbit/s &0000025600000000.0000003.2 GB/s
PC1600 DDR-SDRAM (dual channel) &0000025600000000.00000025.6 Gbit/s &0000025600000000.0000003.2 GB/s
PC3200 DDR-SDRAM (single channel) &0000025600000000.00000025.6 Gbit/s &0000025600000000.0000003.2 GB/s
PC2-3200 DDR2-SDRAM (single channel) &0000025600000000.00000025.6 Gbit/s &0000025600000000.0000003.2 GB/s
PC1066 RDRAM (dual-channel) &0000033600000000.00000033.6 Gbit/s &0000033600000000.0000004.2 GB/s
PC2100 DDR-SDRAM (dual channel) &0000033600000000.00000033.6 Gbit/s &0000033600000000.0000004.2 GB/s
PC2-4200 DDR2-SDRAM (single channel) &0000034100000000.00000034.1 Gbit/s &0000034400000000.0000004.3 GB/s
PC4000 DDR-SDRAM (single channel) &0000034300000000.00000034.3 Gbit/s &0000034296000000.0000004.287 GB/s
PC1200 RDRAM (dual-channel) &0000038400000000.00000038.4 Gbit/s &0000038400000000.0000004.8 GB/s
PC2-5300 DDR2-SDRAM (single channel) &0000042400000000.00000042.4 Gbit/s &0000042400000000.0000005.3 GB/s
PC2-5400 DDR2-SDRAM (single channel) &0000042699999999.99999242.7 Gbit/s &0000042400000000.0000005.3 GB/s
PC2700 DDR-SDRAM (dual channel) &0000043200000000.00000043.2 Gbit/s &0000043200000000.0000005.4 GB/s
PC3200 DDR-SDRAM (dual channel) &0000051200000000.00000051.2 Gbit/s &0000051200000000.0000006.4 GB/s
PC2-3200 DDR2-SDRAM (dual channel) &0000051200000000.00000051.2 Gbit/s &0000051200000000.0000006.4 GB/s
PC2-6400 DDR2-SDRAM (single channel) &0000051200000000.00000051.2 Gbit/s &0000051200000000.0000006.4 GB/s
Itanium zx1 bus &0000051200000000.00000051.2 Gbit/s &0000051200000000.0000006.4 GB/s
PC4000 DDR-SDRAM (dual channel) &0000067200000000.00000067.2 Gbit/s &0000067200000000.0000008.4 GB/s
PC2-4200 DDR2-SDRAM (dual channel) &0000067200000000.00000067.2 Gbit/s &0000067200000000.0000008.4 GB/s
PC2-5300 DDR2-SDRAM (dual channel) &0000084800000000.00000084.8 Gbit/s &0000084800000000.00000010.6 GB/s
PC2-5400 DDR2-SDRAM (dual channel) &0000085300000000.00000085.3 Gbit/s &0000085600000000.00000010.7 GB/s
PC2-6400 DDR2-SDRAM (dual channel) &0000102400000000.000000102.4 Gbit/s &0000102400000000.00000012.8 GB/s
PC2-8000 DDR2-SDRAM (dual channel) &0000128000000000.000000128.0 Gbit/s &0000128000000000.00000016.0 GB/s
PC2-8500 DDR2-SDRAM (dual channel) &0000136000000000.000000136.0 Gbit/s &0000136000000000.00000017 GB/s
PC3-8500 DDR3-SDRAM (dual channel) &0000136000000000.000000136.0 Gbit/s &0000136000000000.00000017.0 GB/s
PC3-10600 DDR3-SDRAM (dual channel) &0000165600000000.000000165.6 Gbit/s &0000169600000000.00000021.2 GB/s
PC3-12800 DDR3-SDRAM (dual channel) &0000204800000000.000000204.8 Gbit/s &0000204800000000.00000025.6 GB/s
PC3-16000 DDR3-SDRAM (dual channel) &0000256000000000.000000256.0 Gbit/s &0000256000000000.00000032.0 GB/s
PC3-12800 DDR3-SDRAM (triple channel) &0000307200000000.000000307.2 Gbit/s &0000307200000000.00000038.4 GB/s
PC3-16000 DDR3-SDRAM (triple channel) &0000384000000000.000000384.0 Gbit/s &0000384000000000.00000048.0 GB/s

Digital audio

Device Speed (bit/s) Speed (byte/s)
S/PDIF &0000000003072000.0000003.072 Mbit/s &0000000003072000.0000000.384 MB/s
I²S  ???  ???
AC'97  ???  ???
McASP  ???  ???
Intel High Definition Audio Rev. 1.0[36] &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator48 (outbound) & 24 (inbound) Mbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator6 & 3 MB/s (outbound & inbound)
ADAT Lightpipe  ???  ???
AES/EBU &0000000002048000.0000002.048 Mbit/s &0000000002048000.0000000.256 MB/s
MADI &0000000100000000.000000100 Mbit/s &0000000100000000.00000012.5 MB/s

Digital video interconnects

Speeds given are from the video source (e.g. video card) to receiving device (e.g. monitor) only. Out of band and reverse signaling channels are not included.

Device Speed (bit/s) Speed (byte/s)
DisplayPort 1 pair[37] &0000002700000000.0000002.7 Gbit/s &0000002700000000.0000000.3375 GB/s
LVDS Display Interface[38] &0000002800000000.0000002.8 Gbit/s &0000002800000000.0000000.35 GB/s
Serial Digital Interface &0000002970000000.0000002.97 Gbit/s &0000002970000000.0000000.37125 GB/s
Single link DVI &0000003960000000.0000003.96 Gbit/s &0000003960000000.0000000.495 GB/s
HDMI v1.0[39] &0000004900000000.0000004.9 Gbit/s &0000004900000000.0000000.6125 GB/s
HDMI v1.1 &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
HDMI v1.2 &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
HDMI v1.2a &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
DisplayPort 2 pairs[37] &0000005400000000.0000005.4 Gbit/s &0000005400000000.0000000.675 GB/s
Dual link DVI &0000007920000000.0000007.92 Gbit/s &0000007920000000.0000000.99 GB/s
HDMI v1.3[40] &0000010200000000.00000010.2 Gbit/s &0000010200000000.0000001.275 GB/s
HDMI v1.3a &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
HDMI v1.3b &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
HDMI v1.3b1 &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
HDMI v1.3c &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s
DisplayPort 4 pairs[37] &0000010800000000.00000010.8 Gbit/s &0000010800000000.0000001.35 GB/s
HDMI Type B &0000020400000000.00000020.4 Gbit/s &0000020400000000.0000002.55 GB/s
HDMI v1.4 &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.? Gbit/s &Expression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operatorExpression error: Unexpected < operator.Expression error: Unexpected < operator?.???? GB/s

See also

Notes

  1. ^ TTY uses a Baudot code, not ASCII. This uses 5 bits per character instead of 8, plus one start and approx. 1.5 stop bits (7.5 total bits per character sent).
  2. ^ a b c d e f g h i j 300 baud modems operating at 30 characters per second, were often described as "reading speed" since the characters scrolled across the screen at the same rate as most people can read. All modems are assumed to be in serial operation with 1 start bit, 8 data bits, no parity, and 1 stop bit (2 stop bits for 110-baud modems). Therefore, a total of 10 bits (11 bits for 110-baud modems) are needed to transmit each 8-bit byte. The "bytes" column reflects the net data transfer rate after the protocol overhead has been removed.
  3. ^ a b c d e Modem Types and Timeline, Daxal Communications, 2003-12-16, http://www.surfthe.us/reference/modem-timeline.html, retrieved 2009-04-16  
  4. ^ a b 56K modems: V.90 and V.92 have just 5% overhead for the protocol signaling. The maximum capacity can only be achieved when the upstream (service provider) end of the connection is digital.
  5. ^ Note that effective aggregate bandwidth for an ISDN installation is typically higher than the rates shown for a single channel due to the use of multiple channels. A basic rate interface (BRI) provides 2 "B" channels and one "D" channel. Each B channel provides 64 kbit/s bandwidth and the 'D' channel carries signalling (call setup) information. B channels can be bonded to provide a 128 kbit/s data rate. Primary rate interfaces (PRI) vary depending on whether the region uses E1 (Europe, world) or T1 (North America) bearers. In E1 regions, the PRI carries 30 B-channels and 1 D-channel; in T1 regions the PRI carries 23 B-channels and 1 D-channel. The D-channel has different bandwidth on the two interfaces.
  6. ^ Massey, David (2006-07-04), "Timeline of Telecommunications", Telephone Tribute, http://www.telephonetribute.com/timeline.html, retrieved 2009-04-16  
  7. ^ http://www.adam.com.au/about_history.php
  8. ^ http://www.itu.int/rec/T-REC-G.991.1-199810-I/en
  9. ^ ADSL connections will vary in throughput from 64 kbit/s to several Mbit/s depending on configuration. Most are commonly below 3 Mbit/s. Some ADSL and SDSL connections have a higher bandwidth than T1 but their bandwidth is not guaranteed, and will drop when the system gets overloaded, whereas the T1 type connections are usually guaranteed and have no contention ratios.
  10. ^ a b DOCSIS 1.0 includes technology which first became available around 1995-1996, and has since become very widely deployed. DOCSIS 1.1 introduces some security improvements and Quality of Service (QoS).
  11. ^ a b DOCSIS 2.0 specifications provide increased upstream throughput for symmetric services.
  12. ^ a b DOCSIS 3.0 is currently in development by the CableLabs consortium and is slated to include support for channel bonding and IPv6.
  13. ^ http://www.itu.int/rec/T-REC-G.983.2/en
  14. ^ http://www.itu.int/rec/T-REC-G.984.4/en
  15. ^ SDSL is available in various different speeds.
  16. ^ ADSL connections will vary in throughput from 64 kbit/s to several Mbit/s depending on configuration. Most are commonly below 2 Mbit/s. Some ADSL and SDSL connections have a higher bandwidth than T1 but their speed is not guaranteed, and will drop when the system gets overloaded, whereas the T1 type connections are usually guaranteed and have no contention ratios.
  17. ^ Satellite internet may have a high bandwidth but also has a high latency due to the distance between the modem, satellite and hub. One-way satellite connections exist where all the downstream traffic is handled by satellite and the upstream traffic by land-based connections such as 56K modems and ISDN.
  18. ^ a b "MoCA 1.1 improves throughput" over coaxial cable to 175 Mbits/s versus the 100 Mbits/s provided by the MoCA 1.0 specification.
  19. ^ FireWire natively supports TCP/IP, and is often used at an alternative to Ethernet when connecting 2 nodes. http://www.tweaktown.com/articles/309/3
  20. ^ Speed comparison between FW and Giganet shows that FW's lower overhead has nearly the same throughput as Giganet http://www.unibrain.com/Products/DriverAPI/FireNET.htm
  21. ^ a b c d e f g h i j InfiniBand uses an 8B/10B encoding scheme.
  22. ^ Hachman, Mark (2002-08-05), "802.11b+" Protocol Bridges 802.11a, 802.11b, ExtremeTech, http://www.extremetech.com/article2/0,2845,437741,00.asp, retrieved 2009-04-16  
  23. ^ Vaughan-Nichols, Steven (2002-10-11), Faster than a speeding 802.11b, ZDNet, http://techupdate.zdnet.com/techupdate/stories/main/0,14179,2885306,00.html, retrieved 2009-04-16  
  24. ^ a b PC bus systems
  25. ^ The Zorro II bus use 4 clocks per 16-Bit of data transferred. See the Zorro III technical specification for more information.
  26. ^ Dave Haynie, designer of the Zorro III bus, claims in this posting that the theoretical max of the Zorro III bus can be derived by the timing information given in ‘’chapter 5’’ of the Zorro III technical specification.
  27. ^ Dave Haynie, designer of the Zorro III bus, claims in this posting that Zorro III is an asynchronous bus and with that does not have a classical MHz rating. A maximum theoretical MHz value may be derived by examining timing constraints detailed in the Zorro III technical specification, which should yield about 37.5 MHz. No existing implementation performs to this level.
  28. ^ Dave Haynie, designer of the Zorro III bus, claims in this posting that Zorro III has a max burst rate of 150 MB/s.
  29. ^ a b c d e Note that PCI Express lanes use an 8B/10B encoding scheme.
  30. ^ a b c PCIe 2.0 effectively doubles the bus standard's bandwidth from 2.5 Gbit/s to 5 Gbit/s
  31. ^ SCSI-1, SCSI-2 and SCSI-3 are signaling protocols and do not explicitly refer to a specific speed. Narrow SCSI exists using SCSI-1 and SCSI-2. Higher speeds use SCSI-2 or later.
  32. ^ a b c d Fibre Channel 1GFC, 2GFC, 4GFC use an 8B/10B encoding scheme. Fibre Channel 10GFC, which uses a 64B/66B encoding scheme, is not compatible with 1GFC, 2GFC and 4GFC, and is used only to interconnect switches.
  33. ^ a b c d e SATA and SAS use an 8B/10B encoding scheme.
  34. ^ a b c FireWire (IEEE 1394b) uses an 8B/10B coding scheme.
  35. ^ a b "Getting Camera Link specs right", Steve Scheiber, Test & Measurement World, May 22, 2006. Retrieved 2007-09-28.
  36. ^ High Definition Audio Specification, Revision 1.0, 2004
  37. ^ a b c [1]Displayport Technical Overview, page 4.
  38. ^ [2]Panel display interfaces and bandwidth: From TTL, LVDS, TDMS to DisplayPort
  39. ^ [3]http://www.octavainc.com/HDMI%201.3.htm
  40. ^ [4]http://www.hdmi.org/learningcenter/faq.aspx#12

External links


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