AMD_sata.sys is the AHCI driver for AMD chipsets.
Have you checked partition alignment? Are you actually experiencing poor performance in real life or is it just a matter of benchmarks?
So my AHCI might be OK? Under Devices / IDE ATA/ATAPI, I have "AMD SATA controller" instead AHCI, so this backs up your point as well (is it?).
What should I check?
AS SSD Benchmark says 103424 K - OK
Partition starting offset can be divided by 4096 (the result is whole number).
I don't have any other real life experiences with SSDs, so I can't compare. (Although it seems OK to me, Windows boots up in no time).
I've read that Benchmark softwares and Samsung Magician may have some problems with AMD chipsets/drivers.... Any other benchmarking software I should try?
Thx for your help!