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{{bit rates}}
{{bit rates}}


In [[telecommunications]], '''data-transfer rate''' is the average number of [[bit]]s ([[bitrate]]), characters or symbols ([[baudrate]]), or data blocks per unit time passing through a communication link in a data-transmission system. Common '''data rate units''' are multiples of [[bits per second]] (bit/s) and [[bytes per second]] (B/s). For example, the data rates of modern residential high-speed Internet connections are commonly expressed in megabits per second (Mbit/s).
In [[telecommunications]], '''data transfer rate''' is the average number of [[bit]]s ([[bitrate]]), characters or symbols ([[baudrate]]), or data blocks per unit time passing through a communication link in a data-transmission system. Common '''data rate units''' are multiples of [[bits per second]] (bit/s) and [[bytes per second]] (B/s). For example, the data rates of modern residential high-speed Internet connections are commonly expressed in megabits per second (Mbit/s).


== Standards for unit symbols and prefixes ==
== Standards for unit symbols and prefixes ==
Line 8: Line 8:


=== Unit symbol ===
=== Unit symbol ===
The [[International System of Quantities|ISQ]] symbols for the bit and byte are ''bit'' and ''B'', respectively. In the context of data-rate units, one byte consists of 8 bits, and is synonymous with the unit [[Octet (computing)|octet]]. The abbreviation bps is often used to mean bit/s, so that when a ''1 Mbps'' connection is advertised, it usually means that the maximum achievable bandwidth is 1 Mbit/s (one million bits per second), which is 0.125 MB/s ([[megabyte per second]]), or about 0.1192 MiB/s ([[mebibyte per second]]). The [[Institute of Electrical and Electronics Engineers]] (IEEE) uses the symbol b for bit.
The [[International System of Quantities|ISQ]] symbols for the bit and byte are ''bit'' and ''B'', respectively. In the context of data-rate units, one byte consists of 8 bits, and is synonymous with the unit [[Octet (computing)|octet]]. The abbreviation bps is often used to mean bit/s, so that when a ''1 Mbps'' connection is advertised, it usually means that the maximum achievable bandwidth is 1 Mbit/s (one million bits per second), which is 0.125 MB/s ([[megabyte per second]]), or about 0.1192 MiB/s ([[mebibyte per second]]). The [[Institute of Electrical and Electronics Engineers]] (IEEE) uses the symbol b for bit.


=== Unit prefixes ===
=== Unit prefixes ===
In both the [[SI]] and ISQ, the prefix k stands for [[kilo-|kilo]], meaning 1,000, while Ki is the symbol for the [[binary prefix]] [[kibi-]], meaning 1,024. The binary prefixes were introduced in 1998 by the [[International Electrotechnical Commission]] (IEC) and in [[IEEE 1541-2002]] which was reaffirmed on 27 March 2008. The letter K is often used as a non-standard abbreviation for 1,024, especially in "KB" to mean KiB, the [[kibibyte|kilobyte in its binary sense]]. In the context of data rates, however, typically only decimal prefixes are used, and they have their standard SI interpretation.
In both the [[SI]] and ISQ, the prefix k stands for [[kilo-|kilo]], meaning 1000, while Ki is the symbol for the [[binary prefix]] [[kibi-]], meaning 1024. The binary prefixes were introduced in 1998 by the [[International Electrotechnical Commission]] (IEC) and in [[IEEE 1541-2002]] which was reaffirmed on 27 March 2008. The letter K is often used as a non-standard abbreviation for 1,024, especially in "KB" to mean KiB, the [[kibibyte|kilobyte in its binary sense]]. In the context of data rates, however, typically only decimal prefixes are used, and they have their standard SI interpretation.


=== Variations ===
=== Variations ===
In 1999, the IEC published Amendment 2 to "[[IEC 60027-2]]: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics." This standard, approved in 1998, introduced the prefixes kibi-, mebi-, gibi-, tebi-, pebi-, and exbi- to be used in specifying binary multiples of a quantity. The name is derived from the first two letters of the original SI prefixes followed by bi (short for ''binary''). It also clarifies that the SI prefixes are used only to mean powers of 10 and never powers of 2.
In 1999, the IEC published Amendment 2 to "[[IEC 60027-2]]: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics". This standard, approved in 1998, introduced the prefixes kibi-, mebi-, gibi-, tebi-, pebi-, and exbi- to be used in specifying binary multiples of a quantity. The name is derived from the first two letters of the original SI prefixes followed by bi (short for ''binary''). It also clarifies that the SI prefixes are used only to mean powers of 10 and never powers of 2.


== Decimal multiples of bits ==
== Decimal multiples of bits ==
Line 20: Line 20:


=== Kilobit per second ===
=== Kilobit per second ===
'''kilobit per second''' (symbol '''kbit/s''' or '''kb/s''', often abbreviated "kbps") is a unit of data transfer rate equal to:
'''Kilobit per second''' (symbol '''kbit/s''' or '''kb/s''', often abbreviated "kbps") is a unit of data transfer rate equal to:
* 1,000 bits per second
* 1,000 bits per second
* 125 bytes per second
* 125 bytes per second


=== Megabit per second ===
=== Megabit per second ===
'''megabit per second''' (symbol '''Mbit/s''' or '''Mb/s''', often abbreviated "Mbps") is a unit of data transfer rate equal to:
'''Megabit per second''' (symbol '''Mbit/s''' or '''Mb/s''', often abbreviated "Mbps") is a unit of data transfer rate equal to:
* 1,000 kilobits per second
* 1,000 kilobits per second
* 1,000,000 bits per second
* 1,000,000 bits per second
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=== Gigabit per second ===
=== Gigabit per second ===
'''gigabit per second''' (symbol '''Gbit/s''' or '''Gb/s''', often abbreviated "Gbps") is a unit of data transfer rate equal to:
'''Gigabit per second''' (symbol '''Gbit/s''' or '''Gb/s''', often abbreviated "Gbps") is a unit of data transfer rate equal to:
* 1,000 megabits per second
* 1,000 megabits per second
* 1,000,000 kilobits per second
* 1,000,000 kilobits per second
Line 40: Line 40:


=== Terabit per second ===
=== Terabit per second ===
'''terabit per second''' (symbol '''Tbit/s''' or '''Tb/s''', sometimes abbreviated "Tbps") is a unit of data transfer rate equal to:
'''Terabit per second''' (symbol '''Tbit/s''' or '''Tb/s''', sometimes abbreviated "Tbps") is a unit of data transfer rate equal to:
* 1,000 gigabits per second
* 1,000 gigabits per second
* 1,000,000 megabits per second
* 1,000,000 megabits per second
Line 49: Line 49:


== Decimal multiples of bytes ==
== Decimal multiples of bytes ==
These units are often not used in the suggested ways; see above section titled "[[#Variations|variations]]".
These units are often not used in the suggested ways; see {{slink||Variations}}.


=== Kilobyte per second ===
=== Kilobyte per second ===
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!bit per second
!bit per second
!byte per second
!byte per second
!bit per second (formula)
!bit per second{{br}}(formula)
!byte per second (formula)
!byte per second{{br}}(formula)
|----
|----
|[[bit]] per second
|[[bit]] per second
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|align="right"|7,000
|align="right"|7,000
|Networking
|Networking
|[[56kbit modem]] – [[56 kbit/s line|56 kbit/s]] – 56,000 bit/s
|[[Modem#56 kbit/s technologies|56 kbit modem]] – 56,000 bit/s
|----
|----
|64
|64
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|align="right"|8,000
|align="right"|8,000
|Networking
|Networking
|64 kbit/s in an [[ISDN]] B channel or best quality, uncompressed telephone line.
|64 kbit/s in an [[Integrated Services Digital Network|ISDN]] B channel or best quality, uncompressed telephone line.
|----
|----
|data-sort-value="1536"|1,536
|data-sort-value="1536"|1,536
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|align="right"|1,250,000
|align="right"|1,250,000
|Biology
|Biology
|Research suggests that the human retina transmits data to the brain at the rate of ca. 10<sup>7</sup> bit/s<ref>{{cite web| url=https://www.pennmedicine.org/news/news-releases/2006/july/penn-researchers-calculate-how|title=Penn Researchers Calculate How Much the Eye Tells the Brain|date=26 July 2006}}</ref> <ref>[http://www.cell.com/current-biology/fulltext/S0960-9822(06)01639-3 Koch K, J McLean, R Segev, MA Freed, MJ Berry II, V Balasubramanian, P Sterling. 2006. How much the eye tells the brain. Current Biology 16:1428-1434.], 26 July 2006</ref>{{Dubious|date=June 2015}}
|Research suggests that the human retina transmits data to the brain at the rate of ca. 10<sup>7</sup> bit/s<ref>{{cite web| url=https://www.pennmedicine.org/news/news-releases/2006/july/penn-researchers-calculate-how|title=Penn Researchers Calculate How Much the Eye Tells the Brain|date=26 July 2006}}</ref><ref>{{Cite journal |last1=Koch |first1=Kristin |last2=McLean |first2=Judith |last3=Segev |first3=Ronen |last4=Freed |first4=Michael A. |last5=Berry |first5=Michael J. |last6=Balasubramanian |first6=Vijay |last7=Sterling |first7=Peter |date=2006-07-25 |title=How Much the Eye Tells the Brain |journal=Current Biology |language=English |volume=16 |issue=14 |pages=1428–1434 |doi=10.1016/j.cub.2006.05.056 |issn=0960-9822 |pmid=16860742|pmc=1564115 |bibcode=2006CBio...16.1428K }}</ref>{{Dubious|date=June 2015}}
|----
|----
|data-sort-value="54000"|54
|data-sort-value="54000"|54
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|align="right"|155,500,000
|align="right"|155,500,000
|Networking
|Networking
|[[OC-24]], a 1.244 Gbit/s [[SONET]] data channel
|[[OC-24]], a 1.244&nbsp;Gbit/s [[SONET]] data channel
|----
|----
|data-sort-value="9953000"|9.953
|data-sort-value="9953000"|9.953
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|align="right"|4,976,625,000
|align="right"|4,976,625,000
|Networking
|Networking
|[[OC-768]], a 39.813 Gbit/s [[SONET]] data channel, the fastest in current use
|[[OC-768]], a 39.813&nbsp;Gbit/s [[SONET]] data channel, the fastest in current use
|----
|----
|data-sort-value="4800000"|60
|data-sort-value="4800000"|60
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|align="right"|120,000,000
|align="right"|120,000,000
|Computer data interfaces
|Computer data interfaces
|[[Harddrive]] read, Samsung SpinPoint F1 HD103Uj<ref>{{cite web|url=http://www.tomshardware.com/reviews/samsung-overtakes-a-bang,1730-9.html|title=Samsung overtakes}}</ref>
|[[Harddrive]] read, Samsung SpinPoint F1 HD103Uj<ref>{{cite web|url=http://www.tomshardware.com/reviews/samsung-overtakes-a-bang,1730-9.html|title=Samsung overtakes|date=21 November 2007 }}</ref>
|----
|----
|data-sort-value="1064000"|133
|data-sort-value="1064000"|133
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|align="right"|188,000,000
|align="right"|188,000,000
|Computer data interfaces
|Computer data interfaces
|[[Serial ATA|SATA I]] 1.5 Gbit/s&nbsp;– First generation
|[[Serial ATA|SATA I]] 1.5&nbsp;Gbit/s&nbsp;– First generation
|----
|----
|data-sort-value="3000000"|375
|data-sort-value="3000000"|375
Line 444: Line 444:
|align="right"|375,000,000
|align="right"|375,000,000
|Computer data interfaces
|Computer data interfaces
|[[Serial ATA|SATA II]] 3Gbit/s&nbsp;– Second generation
|[[Serial ATA|SATA II]] 3&nbsp;Gbit/s&nbsp;– Second generation
|----
|----
|data-sort-value="4000000"|500
|data-sort-value="4000000"|500
Line 465: Line 465:
|align="right"|750,000,000
|align="right"|750,000,000
|Computer data interfaces
|Computer data interfaces
|[[Serial ATA|SATA III]] 6 Gbit/s&nbsp;– Third generation
|[[Serial ATA|SATA III]] 6&nbsp;Gbit/s&nbsp;– Third generation
|----
|----
|data-sort-value="8533333"|1067
|data-sort-value="8533333"|1,067
|MB/s
|MB/s
|align="right"|8,533,333,333
|align="right"|8,533,333,333
Line 481: Line 481:
|[[USB 3.1]] SuperSpeed+ - a.k.a. USB 3.1 Gen2
|[[USB 3.1]] SuperSpeed+ - a.k.a. USB 3.1 Gen2
|----
|----
|data-sort-value="10000000"|1250
|data-sort-value="10000000"|1,250
|MB/s
|MB/s
|align="right"|10,000,000,000
|align="right"|10,000,000,000
Line 488: Line 488:
|[[Thunderbolt (interface)|Thunderbolt]]
|[[Thunderbolt (interface)|Thunderbolt]]
|----
|----
|data-sort-value="20000000"|2500
|data-sort-value="20000000"|2,500
|MB/s
|MB/s
|align="right"|20,000,000,000
|align="right"|20,000,000,000
Line 495: Line 495:
|[[Thunderbolt (interface)|Thunderbolt 2]]
|[[Thunderbolt (interface)|Thunderbolt 2]]
|----
|----
|data-sort-value="40000000"|5000
|data-sort-value="40000000"|5,000
|MB/s
|MB/s
|align="right"|40,000,000,000
|align="right"|40,000,000,000
Line 502: Line 502:
|[[Thunderbolt 3]]
|[[Thunderbolt 3]]
|----
|----
|data-sort-value="64000000"|8000
|data-sort-value="64000000"|8,000
|MB/s
|MB/s
|align="right"|64,000,000,000
|align="right"|64,000,000,000
Line 509: Line 509:
|[[PCI Express#PCI Express 2.0|PCI Express x16 v2.0]]
|[[PCI Express#PCI Express 2.0|PCI Express x16 v2.0]]
|----
|----
|data-sort-value="96000000"|12000
|data-sort-value="96000000"|12,000
|MB/s
|MB/s
|align="right"|96,000,000,000
|align="right"|96,000,000,000
|align="right"|12,000,000,000
|align="right"|12,000,000,000
|Computer data interfaces
|Computer data interfaces
|[[Infiniband|InfiniBand 12X QDR]]
|[[InfiniBand|InfiniBand 12X QDR]]
|----
|----
|data-sort-value="128000000"|16000
|data-sort-value="128000000"|16,000
|MB/s
|MB/s
|align="right"|128,000,000,000
|align="right"|128,000,000,000
Line 528: Line 528:
* [[Binary prefix]]
* [[Binary prefix]]
* [[Bit rate]]
* [[Bit rate]]
* [[List of device bandwidths]]
* [[List of interface bit rates]]
* [[Orders of magnitude (bit rate)]]
* [[Orders of magnitude (bit rate)]]
* [[Orders of magnitude (data)]]
* [[Orders of magnitude (data)]]
* [[SI prefix]]
* [[Metric prefix]]
* [[Instructions per second]]
* [[Instructions per second]]


Line 540: Line 540:
* International Electrotechnical Commission (2007). "[https://web.archive.org/web/20090403051731/http://www.iec.ch/zone/si/si_bytes.htm Prefixes for binary multiples]" (archived). Retrieved on 2007-05-06. - [https://www.iec.ch/si/binary.htm updated page] {{Webarchive|url=https://web.archive.org/web/20200511104612/https://www.iec.ch/si/binary.htm |date=2020-05-11 }} lacks table but now references IEC 80000-13:2008 rather than IEC 60027-2.
* International Electrotechnical Commission (2007). "[https://web.archive.org/web/20090403051731/http://www.iec.ch/zone/si/si_bytes.htm Prefixes for binary multiples]" (archived). Retrieved on 2007-05-06. - [https://www.iec.ch/si/binary.htm updated page] {{Webarchive|url=https://web.archive.org/web/20200511104612/https://www.iec.ch/si/binary.htm |date=2020-05-11 }} lacks table but now references IEC 80000-13:2008 rather than IEC 60027-2.
* [http://webstore.iec.ch/webstore/webstore.nsf/mysearchajax?Openform&key=60027-2&sorting=&start=1&onglet=1/ IEC 60027-2 "Letter symbols to be used in electrical technology&nbsp;– Part 2: Telecommunications and electronics+]
* [http://webstore.iec.ch/webstore/webstore.nsf/mysearchajax?Openform&key=60027-2&sorting=&start=1&onglet=1/ IEC 60027-2 "Letter symbols to be used in electrical technology&nbsp;– Part 2: Telecommunications and electronics+]
* [[Donald Knuth]]: [http://www-cs-staff.stanford.edu/~uno/news99.html "What is a kilobyte?"]
* [[Donald Knuth]]: [http://www-cs-staff.stanford.edu/~uno/news99.html "What is a kilobyte?"] {{Webarchive|url=https://web.archive.org/web/20160305053201/http://www-cs-staff.stanford.edu/~uno/news99.html |date=2016-03-05 }}



==External links==
== External links ==
* [https://tools.valid8.com/#dataRate Valid8 Data Rate Calculator]
* [https://tools.valid8.com/#dataRate Valid8 Data Rate Calculator]


Latest revision as of 12:01, 6 September 2024

Bit rates (data-rate units)
Name Symbol Multiple
bit per second bit/s 1 1
Metric prefixes (SI)
kilobit per second kbit/s 103 10001
megabit per second Mbit/s 106 10002
gigabit per second Gbit/s 109 10003
terabit per second Tbit/s 1012 10004
Binary prefixes (IEC 80000-13)
kibibit per second Kibit/s 210 10241
mebibit per second Mibit/s 220 10242
gibibit per second Gibit/s 230 10243
tebibit per second Tibit/s 240 10244

In telecommunications, data transfer rate is the average number of bits (bitrate), characters or symbols (baudrate), or data blocks per unit time passing through a communication link in a data-transmission system. Common data rate units are multiples of bits per second (bit/s) and bytes per second (B/s). For example, the data rates of modern residential high-speed Internet connections are commonly expressed in megabits per second (Mbit/s).

Standards for unit symbols and prefixes

[edit]
See also: Bit rate

Unit symbol

[edit]

The ISQ symbols for the bit and byte are bit and B, respectively. In the context of data-rate units, one byte consists of 8 bits, and is synonymous with the unit octet. The abbreviation bps is often used to mean bit/s, so that when a 1 Mbps connection is advertised, it usually means that the maximum achievable bandwidth is 1 Mbit/s (one million bits per second), which is 0.125 MB/s (megabyte per second), or about 0.1192 MiB/s (mebibyte per second). The Institute of Electrical and Electronics Engineers (IEEE) uses the symbol b for bit.

Unit prefixes

[edit]

In both the SI and ISQ, the prefix k stands for kilo, meaning 1000, while Ki is the symbol for the binary prefix kibi-, meaning 1024. The binary prefixes were introduced in 1998 by the International Electrotechnical Commission (IEC) and in IEEE 1541-2002 which was reaffirmed on 27 March 2008. The letter K is often used as a non-standard abbreviation for 1,024, especially in "KB" to mean KiB, the kilobyte in its binary sense. In the context of data rates, however, typically only decimal prefixes are used, and they have their standard SI interpretation.

Variations

[edit]

In 1999, the IEC published Amendment 2 to "IEC 60027-2: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics". This standard, approved in 1998, introduced the prefixes kibi-, mebi-, gibi-, tebi-, pebi-, and exbi- to be used in specifying binary multiples of a quantity. The name is derived from the first two letters of the original SI prefixes followed by bi (short for binary). It also clarifies that the SI prefixes are used only to mean powers of 10 and never powers of 2.

Decimal multiples of bits

[edit]

These units are often used in a manner inconsistent with the IEC standard.

Kilobit per second

[edit]

Kilobit per second (symbol kbit/s or kb/s, often abbreviated "kbps") is a unit of data transfer rate equal to:

  • 1,000 bits per second
  • 125 bytes per second

Megabit per second

[edit]

Megabit per second (symbol Mbit/s or Mb/s, often abbreviated "Mbps") is a unit of data transfer rate equal to:

  • 1,000 kilobits per second
  • 1,000,000 bits per second
  • 125,000 bytes per second
  • 125 kilobytes per second

Gigabit per second

[edit]

Gigabit per second (symbol Gbit/s or Gb/s, often abbreviated "Gbps") is a unit of data transfer rate equal to:

  • 1,000 megabits per second
  • 1,000,000 kilobits per second
  • 1,000,000,000 bits per second
  • 125,000,000 bytes per second
  • 125 megabytes per second

Terabit per second

[edit]

Terabit per second (symbol Tbit/s or Tb/s, sometimes abbreviated "Tbps") is a unit of data transfer rate equal to:

  • 1,000 gigabits per second
  • 1,000,000 megabits per second
  • 1,000,000,000 kilobits per second
  • 1,000,000,000,000 bits per second
  • 125,000,000,000 bytes per second
  • 125 gigabytes per second

Decimal multiples of bytes

[edit]

These units are often not used in the suggested ways; see § Variations.

Kilobyte per second

[edit]

kilobyte per second (kB/s) (can be abbreviated as kBps) is a unit of data transfer rate equal to:

  • 8,000 bits per second
  • 1,000 bytes per second
  • 8 kilobits per second

Megabyte per second

[edit]

megabyte per second (MB/s) (can be abbreviated as MBps) is a unit of data transfer rate equal to:

  • 8,000,000 bits per second
  • 1,000,000 bytes per second
  • 1,000 kilobytes per second
  • 8 megabits per second

Gigabyte per second

[edit]

gigabyte per second (GB/s) (can be abbreviated as GBps) is a unit of data transfer rate equal to:

  • 8,000,000,000 bits per second
  • 1,000,000,000 bytes per second
  • 1,000,000 kilobytes per second
  • 1,000 megabytes per second
  • 8 gigabits per second

Terabyte per second

[edit]

terabyte per second (TB/s) (can be abbreviated as TBps) is a unit of data transfer rate equal to:

  • 8,000,000,000,000 bits per second
  • 1,000,000,000,000 bytes per second
  • 1,000,000,000 kilobytes per second
  • 1,000,000 megabytes per second
  • 1,000 gigabytes per second
  • 8 terabits per second

Conversion table

[edit]
Name Symbol bit per second byte per second bit per second
(formula) 		byte per second
(formula)
bit per second bit/s 1 0.125 1 ⁠1/8⁠
byte per second B/s 8 1 8 1
kilobit per second kbit/s 1,000 125 103 ⁠1/8⁠ × 103
kibibit per second Kibit/s 1,024 128 210 27
kilobyte per second kB/s 8,000 1,000 8 × 103 103
kibibyte per second KiB/s 8,192 1,024 213 210
megabit per second Mbit/s 1,000,000 125,000 106 ⁠1/8⁠ × 106
mebibit per second Mibit/s 1,048,576 131,072 220 217
megabyte per second MB/s 8,000,000 1,000,000 8 × 106 106
mebibyte per second MiB/s 8,388,608 1,048,576 223 220
gigabit per second Gbit/s 1,000,000,000 125,000,000 109 ⁠1/8⁠ × 109
gibibit per second Gibit/s 1,073,741,824 134,217,728 230 227
gigabyte per second GB/s 8,000,000,000 1,000,000,000 8 × 109 109
gibibyte per second GiB/s 8,589,934,592 1,073,741,824 233 230
terabit per second Tbit/s 1,000,000,000,000 125,000,000,000 1012 ⁠1/8⁠ × 1012
tebibit per second Tibit/s 1,099,511,627,776 137,438,953,472 240 237
terabyte per second TB/s 8,000,000,000,000 1,000,000,000,000 8 × 1012 1012
tebibyte per second TiB/s 8,796,093,022,208 1,099,511,627,776 243 240

Examples of bit rates

[edit]
Main article: List of interface bit rates
Quantity Unit bits per second bytes per second Field Description
56 kbit/s 56,000 7,000 Networking 56 kbit modem – 56,000 bit/s
64 kbit/s 64,000 8,000 Networking 64 kbit/s in an ISDN B channel or best quality, uncompressed telephone line.
1,536 kbit/s 1,536,000 192,000 Networking 24 channels of telephone in the US, or a good VTC T1.
10 Mbit/s 10,000,000 1,250,000 Networking 107 bit/s is the speed of classic Ethernet: 10BASE2, 10BASE5, 10BASE-T
10 Mbit/s 10,000,000 1,250,000 Biology Research suggests that the human retina transmits data to the brain at the rate of ca. 107 bit/s[1][2][dubious – discuss]
54 Mbit/s 54,000,000 6,750,000 Networking 802.11g, Wireless G LAN
100 Mbit/s 100,000,000 12,500,000 Networking Fast Ethernet
600 Mbit/s 600,000,000 75,000,000 Networking 802.11n, Wireless N LAN
1 Gbit/s 1,000,000,000 125,000,000 Networking 1 Gigabit Ethernet
10 Gbit/s 10,000,000,000 1,250,000,000 Networking 10 Gigabit Ethernet
100 Gbit/s 100,000,000,000 12,500,000,000 Networking 100 Gigabit Ethernet
1 Tbit/s 1,000,000,000,000 125,000,000,000 Networking SEA-ME-WE 4 submarine communications cable – 1.28 terabits per second[3]
4 kbit/s 4,000 500 Audio data minimum achieved for encoding recognizable speech (using special-purpose speech codecs)
8 kbit/s 8,000 1,000 Audio data low bit rate telephone quality
32 kbit/s 32,000 4,000 Audio data MW quality and ADPCM voice in telephony, doubling the capacity of a 30 chan link to 60 ch.
128 kbit/s 128,000 16,000 Audio data 128 kbit/s MP3 – 128,000 bit/s
192 kbit/s 192,000 24,000 Audio data 192 kbit/s MP3 – 192,000 bit/s
1,411.2 kbit/s 1,411,200 176,400 Audio data CD audio (uncompressed, 16 bit samples × 44.1 kHz × 2 channels)
2 Mbit/s 2,000,000 250,000 Video data 30 channels of telephone audio or a Video Tele-Conference at VHS quality
8 Mbit/s 8,000,000 1,000,000 Video data DVD quality
27 Mbit/s 27,000,000 3,375,000 Video data HDTV quality
1.244 Gbit/s 1,244,000,000 155,500,000 Networking OC-24, a 1.244 Gbit/s SONET data channel
9.953 Gbit/s 9,953,000,000 1,244,125,000 Networking OC-192, a 9.953 Gbit/s SONET data channel
39.813 Gbit/s 39,813,000,000 4,976,625,000 Networking OC-768, a 39.813 Gbit/s SONET data channel, the fastest in current use
60 MB/s 480,000,000 60,000,000 Computer data interfaces USB 2.0 High-Speed
98.3 MB/s 786,432,000 98,304,000 Computer data interfaces FireWire IEEE 1394b-2002 S800
120 MB/s 960,000,000 120,000,000 Computer data interfaces Harddrive read, Samsung SpinPoint F1 HD103Uj[4]
133 MB/s 1,064,000,000 133,000,000 Computer data interfaces Parallel ATA UDMA 6
133 MB/s 1,064,000,000 133,000,000 Computer data interfaces PCI 32-bit at 33 MHz (standard configuration)
188 MB/s 1,504,000,000 188,000,000 Computer data interfaces SATA I 1.5 Gbit/s – First generation
375 MB/s 3,000,000,000 375,000,000 Computer data interfaces SATA II 3 Gbit/s – Second generation
500 MB/s 4,000,000,000 500,000,000 Computer data interfaces PCI Express x1 v2.0
5.0 Gbit/s 5,000,000,000 625,000,000 Computer data interfaces USB 3.0 SuperSpeed - a.k.a. USB 3.1 Gen1
750 MB/s 6,000,000,000 750,000,000 Computer data interfaces SATA III 6 Gbit/s – Third generation
1,067 MB/s 8,533,333,333 1,066,666,667 Computer data interfaces PCI-X 64 bit 133 MHz
10 Gbit/s 10,000,000,000 1,250,000,000 Computer data interfaces USB 3.1 SuperSpeed+ - a.k.a. USB 3.1 Gen2
1,250 MB/s 10,000,000,000 1,250,000,000 Computer data interfaces Thunderbolt
2,500 MB/s 20,000,000,000 2,500,000,000 Computer data interfaces Thunderbolt 2
5,000 MB/s 40,000,000,000 5,000,000,000 Computer data interfaces Thunderbolt 3
8,000 MB/s 64,000,000,000 8,000,000,000 Computer data interfaces PCI Express x16 v2.0
12,000 MB/s 96,000,000,000 12,000,000,000 Computer data interfaces InfiniBand 12X QDR
16,000 MB/s 128,000,000,000 16,000,000,000 Computer data interfaces PCI Express x16 v3.0

See also

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Notes

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  1. ^ "Penn Researchers Calculate How Much the Eye Tells the Brain". 26 July 2006.
  2. ^ Koch, Kristin; McLean, Judith; Segev, Ronen; Freed, Michael A.; Berry, Michael J.; Balasubramanian, Vijay; Sterling, Peter (2006-07-25). "How Much the Eye Tells the Brain". Current Biology. 16 (14): 1428–1434. Bibcode:2006CBio...16.1428K. doi:10.1016/j.cub.2006.05.056. ISSN 0960-9822. PMC 1564115. PMID 16860742.
  3. ^ "Fujitsu Completes Construction of SEA-ME-WE 4 Submarine Cable Network". Fujitsu Press Releases. Fujitsu. 2005-12-13. Archived from the original on 2007-03-17. Retrieved 2008-01-31.
  4. ^ "Samsung overtakes". 21 November 2007.

References

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