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USB 3.0 In USB 2.0 Mode Tests
We were wondering if the USB 3.0 adaptor would perform better than the standard USB 2.0 adaptor in the USB 2.0 mode. So we tested the USB 3.0 adaptor with USB 2.0 ports and see how it compared to the USB 2.0 adaptor.
Throughput (Sequential Access)
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
35.29 MB/s |
35.44 MB/s |
- 0.4% |
512 KB Write |
29.21 MB/s |
29.25 MB/s |
- 0.1% |
4 KB Read |
7.75 MB/s |
7.68 MB/s |
+ 0.9% |
4 KB Write |
7.77 MB/s |
7.77 MB/s |
- |
Sequential Access Time
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
14.16 ms |
14.10 ms |
+ 0.4% |
512 KB Write |
17.11 ms |
17.09 ms |
+ 0.1% |
4 KB Read |
0.50 ms |
0.51 ms |
- 2.0% |
4 KB Write |
0.50 ms |
0.50 ms |
- |
CPU Utilization (Sequential Access)
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
1.07% |
0.98% |
+ 9.2% |
512 KB Write |
0.88% |
0.97% |
- 9.3% |
4 KB Read |
3.05% |
3.28% |
- 7.0% |
4 KB Write |
3.24% |
3.39% |
- 4.4% |
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