Data Bus Comparison

Theoretical bus speeds. Note that actual data throughput will vary depending on amount of data, packet size etc. Usuallly the real world data transfer speeds will be less than the theoretical maximum.
Protocol MBytes/sec Mbits/sec Width (bits) Length (m) # Nodes
PCI-express 4000 40000 16 - -
PCI-express 2000 20000 8 - -
PCI-express 1000 10000 4 - -
PCI-66 528 4224 64 - -
PCI-express 500 5000 2 - -
Firewire 1394b 400 3200 1 100 64
PCI-66 264 2112 32 - -
PCI-33 264 2112 64 - -
PCI-express 250 2500 1 - -
MXI-3 133 1500 1 200 2
SCSI-3/Ultra160 160 1280 32 5 8
PCI-33 132 1056 32 - -
Gigabit Enet 125 1000 1 100 255
UltraATA/100 100 800 16 1 2
Ultra-2 SCSI LVD 80 640 16 5 8
UltraATA/66 66 528 32 1 2
USB 2.0 only 60 480 1 5 127
Firewire 1394a 50 400 1 4.5 64
100Base-T Enet 12.5 100 1 100 255
SCSI 5 40 8 5 8
DV Capture 3.75 30 N/A N/A N/A
USB 1.0 1.5 12 1 5 127
10Base-T 1.25 10 1 100 255
GPIB/488 1 8 8 16 31
Serial 230kbaud RS485 0.023 0.184 1 300 32
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