Total Access Time
The access time test measures the total latency across all 18 tests. This is one of the most important tests we run at this time for consumer SSDs. When your latency is low, your computer feels fast; it's just that simple.
Throughput is an important metric and one that everyone understands, but latency is what makes your computer feel fast. Most manufacturers don't publish latency results because it varies depending on the condition of the flash. In this chart, we see the total access time to complete the tasks in PCMark 8's tests added together. The lower the overall latency, the faster your computer feels when issuing tasks. The Extreme PRO dominated this metric and was built specifically for this purpose.
Disk Busy Time
In the final test, we measure the amount of time the drive worked to read and write the data to complete the test. When a drive is active, it uses more power, so the faster it can complete the tasks, the faster it can fall into a low power state.
The disk busy time metric shows how long it took each drive to complete the tasks. Drives that complete the actions faster get to return to an idle state faster. This reduces overall power consumption over time.