Serial ATA performance — continued
We used HD Tach 3.01's 8MB zone test to measure basic SATA throughput and latency.
The results of HD Tach's burst and sustained read speed tests are close, but the nForce opens up a big lead on the 790GX in the sustained write speed test. We've noticed that this test favors storage controllers that support Native Command Queuing, which explains the 790GX's dismal showing.
AMD does eke out a small lead in the access time test, where the 790GX shaves 0.3 milliseconds off the nForce 750a's random access time.
HD Tach's margin of error for the CPU utilization test is +/- 2%, and our scores are within that range, making this one too close to call.
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