Today I used the AMD CCC overdrive utility and found my processor clocked at 4 GHz from the standard 3.6 GHz...very unstable. I reset the BIOS to default and lost my SATA controller setting of AHCI. When I set the BIOS to AHCI windows crashes with "can't find device error".
The registry setting for msahci is still at the value zero.
The system was rock solid with a Samsung 840 EVO. Samsung Magician indicates it is unable to detect SATA interface details.
AMD FX4100 3.6 Ghz
8GB generic memory 1600
Gigabyte 7750 graphics card
Win 7 home premium