HD Tach
We used HD Tach 3.01's 8MB zone test to measure basic SATA throughput and latency.

The 750a and 780a remain closely matched through HD Tach's transfer rate tests. Note how both have a huge lead over the 790FX in sustained write speeds. We've found that this test takes advantage of storage controllers that support Native Command Queuing to enable substantially higher transfer rates.

Access times are too close to call.

The results of HD Tach's CPU utilization test are within the app's +/- 2% margin of error for this test.