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Updated Oct 22 2002

The Peripheral Speed Page

Here is a chart outlining the maximum transfer rates for various computer connections.
Ratings are in both Mebabits per second and Megabytes per second:


Peripheral
Speed in Mega Bits Per Second
Speed in Mega Bytes Per Second
Serial Port
0.115
0.014375
Standard parallel port:
0.92
0.115
USB 1.1
12
1.5
ECP/EPP parallel port:
24
3
SCSI-1
40
5
SCSI-2 (Fast SCSI, Fast Narrow SCSI)
80
10
IDE
26.4 to 133.6
3.3 to 16.7
Fast Wide SCSI (Wide SCSI)
160
20
Ultra SCSI (SCSI-3, Fast-20, Ultra Narrow)
160
20
UltraIDE
264
33
Wide Ultra SCSI (Fast Wide 20)
320
40
Ultra2 SCSI
320
40
IEEE-1394
100-400
12.5 to 50
USB 2.0
480
60
Wide Ultra2 SCSI
640
80
Ultra3 SCSI
640
80
Wide Ultra3 SCSI
1280
160
FC-AL Fiber Channel:
800 to 3200
100 to 400
Peripheral
Speed in Mega Bits Per Second
Speed in Mega Bytes Per Second

This chart is compiled from information found on www.usb.org
 

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