Yes the AHCI the problem exists for me since 12.1
I have 790GX+SB750
W7 solution:
x:\AMD\support\xx-x_vista_win7_32-64_sb\Packages\Drivers\SBDrv\SB7xx\AHCI\W764A
Open amd_sata.inf
HKR, "Parameters\Device","AmdSataPMDisabled",%REG_DWORD%, 0
change to
HKR, "Parameters\Device","AmdSataPMDisabled",%REG_DWORD%, 0xFF
(add xFF)
Run setup.exe
W8 solution:
x:\AMD\support\xx-x_vista_win7_32-64_sb\Packages\Drivers\SBDrv\SB7xx\AHCI\W764A
Open amd_sata.inf
;HKR, "Parameters\Device","AmdSataPMDisabled",%REG_DWORD%, 0xFF
change to
HKR, "Parameters\Device","AmdSataPMDisabled",%REG_DWORD%, 0xFF
(remove ; char)
Run setup.exe
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AMD Phenom II 1100T | MSI HD5850 1GB OC edition | MSI DKA790GX | 8GB DDR2 G.Skill 1066MHz running at 800MHz | 1TB Western Digital Caviar Black 64MB cache | Windows 7 SP1 x64