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Transfer Rate Specs:
There has been a lot of discussion about which transfer technology is faster between devices. Technology is constantly changing, but as of Super Bowl Sunday, 2001, here are the current Transfer Rates.
[We have not used the term Bandwidth since that would imply actual Throughput. Bandwidth is often times misconstrued as Actual Sustained Throughput. NOT! Bandwidth expressed usually means Burst Mode Throughput implied. We're only identifying the Specification and not actual sustained Throughput. GB - Enjoy!]
By Joe Whinery
Maximum transfer rates of various technologies...
- Kbps = (KiloBits Per Second) - Kbps is used as a rating of slow transmission speed.
- Mbps = (MegaBits Per Second) - Mbps is commonly used as a rating of [higher capacity] transmission speed.
- Gbps = (GigaBits Per Second)
- GBps = (gigaBYTES per second)
|
Technology |
MBytes/sec |
Kbytes/sec |
|
| Serial Port |
14.75 |
||
|
Std Parallel Port |
0 |
.144 |
= 500 |
| USB ver. 1.1 |
1 |
.5 | |
| ECP/EPP (IEEE 1284) |
3 |
||
|
IDE (min) Parallel ATA |
3 |
.3 | |
|
IDE (max) Parallel ATA |
16 |
.7 | |
| ISA Bus |
16 |
.7 |
|
| SCSI 1 |
5 |
||
| SCSI 2 |
10 |
||
| SCSI 3 |
20 |
||
| IDE Ultra DMA 3 (ATA/33) |
33 |
||
| Wide SCSI @ Ultra 2 |
40 |
||
| 1394 FireWire (backplane) |
50 |
||
| USB ver. 2.0 |
60 |
||
| IDE Ultra DMA 66 (ATA/66) |
66 |
||
| Ultra 3 SCSI |
80 |
||
| IDE Ultra DMA 100 (ATA/100) |
100 |
||
| IDE ULTRA ATA/133 |
133 |
||
| SATA 1.5Gbps - Generation 1 Serial ATA |
150 |
(= 1.5Gbps) | |
| SATA 3Gbps |
300 |
(= 3Gbps) | |
| USB 3.0 | (5Gbps) | ||
| SATA 6Gb/s | (6Gb/s) | ||
| FC-AL Fiber Channel (Arbitrated Loop) |
100 |
||
| Wide Ultra 3 SCSI (Ultra 160) |
160 |
||
| Ultra 4 (Ultra 320) |
320 |
||
| Fiber Channel (quad speed) (*) |
400 |
||
| Ultra 640 SCSI |
640 |
||
|
Mbits/sec |
|||
| 10BaseT EtherNet (CAT5 RJ-45) Twisted Pair |
10 |
(= 1.25 MB/sec) | |
| 100BaseT Fast Ethernet |
100 |
(= 12.5 MB/sec) | |
| 1000BaseT Gigabit Ethernet (GbE) [Intel CSA] |
(1 Gbps) = 1,000 |
(= 125 MB/sec) | |
|
IEEE 1394 FireWire (cable) |
400 |
(= 50 MB/sec) |
|
| USB 2.0 |
480 |
(= 60 MB/sec) | |
| IEEE 1394b FireWire a.k.a. FireWire 800 |
800 |
(= 100 MB/sec) | |
|
1600 |
(= 200 MB/sec) | ||
|
|
3200 |
(= 400 MB/sec) |
|
| 10 Gigabit Ethernet (10GbE) |
(10 Gbps) = 10,000 |
(= 1,250 MB/sec) | |
| PCI (Peripheral Component Interconnect) Bus (Parrallel) |
133 MB/s |
- 33-MHz PCI | |
|
AGP (Accelerated Graphics Port - 8x) |
2,133 MB/s |
(= 2.1 GB/sec) | |
| PCI Express - PCIe (Serial) | |||
| PCI Express 1x |
250 [500]* MB/s |
||
| PCI Express 2x | 500 [1000]* MB/s | (= 1 GB/sec) | |
| PCI Express 4x | 1000 [2000]* MB/s | (= 2 GB/sec) | |
| PCI Express 8x | 2000 [4000]* MB/s | (= 4 GB/sec) | |
| PCI Express 16x | 4000 [8000]* MB/s | (= 8 GB/sec) | |
| PCI Express 32x | 8000 [16000]* MB/s | (= 16 GB/s) | |
- PCI Express added when PCIe 2.0 became a shipping product on affordable MotherBoards (January 2008).
- USB 2.0 and Windows: WinXP HE / Pro & Win2000, NO Win9x support from Microsoft (6/17/2002).
- End of Line for Parallel ATA: ATA/133 was introduced in September of 2001 according to Maxtor. ATA Specs highlight Burst Mode Transfer Rates and not actual Sustained Throughput!
- Editorial Note: We added Serial ATA when relevance became reality.
- Editorial Note: Added USB since USB 1.1 vs. 2.0 is becoming a reality and so too the added confusion (12/7/2002).
- Editorial Note: Added AGP & PCI Express for relative technology speed comparisons (5/2/2003).
- From www.ExtremeTech.com Forum Discussions: Speed Chart for Data Systems (7/14/2004) Note: This is one of the best, most complete Charts available! (3/23/2008)