AIDA64 Random Access Time
Version and / or Patch Used: 1.60
Developer Homepage: http://www.aida64.com
Product Homepage: http://www.aida64.com
AIDA64 offers several different benchmarks for testing and optimizing your system or network. The Random Access test is one of very few, if not the only, that will measure hard drive random access time in hundredths of milliseconds as oppose to tens of milliseconds.
Latency and random performance at QD1 remain close to speeds we see on Marvell's SATA based controllers.
This is an area we're still coming to terms with because, in theory, when you remove the PCH or South Bridge and move the connection directly to the CPU, it would seem that latency should decrease. In every PCIe SSD we've tested, our theory didn't pan out, but we think AHCI is the reason why. Still, latency is very low.