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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 (Random Access)
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
14.83 MB/s |
14.83 MB/s |
- |
512 KB Write |
21.57 MB/s |
22.30 MB/s |
- 3.3% |
4 KB Read |
0.21 MB/s |
0.21 MB/s |
- |
4 KB Write |
0.37 MB/s |
0.41 MB/s |
- 9.8% |
Random Access Time
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
33.71 ms |
33.70 ms |
- |
512 KB Write |
23.15 ms |
22.41 ms |
+ 3.3% |
4 KB Read |
18.97 ms |
18.92 ms |
- |
4 KB Write |
10.65 ms |
9.51 ms |
+ 12.0% |
CPU Utilization (Random Access)
Test |
USB 3.0 In |
USB 2.0 |
Difference |
512 KB Read |
0.47% |
0.43% |
+ 9.3% |
512 KB Write |
0.60% |
0.79% |
- 24.1% |
4 KB Read |
0.18% |
0.40% |
- 55.0% |
4 KB Write |
0.24% |
0.25% |
- 4.0% |
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