canonkong

I modified the CPU driver and install it. But only show one processor. Modify the *.inf file and add this line: %AmdPPM.DeviceDesc% = AmdPPM_Inst,ACPI\ACPI0010

@Damnation After update the latest bios, I found ACPI\ACPI0010 which names Generic Bus in system device.

@Damnation I can't find any systems with this ACPI0010 Device on my Gigabyte B550I AORUS PRO AX.

@daniel_k So I need to modify the bios to fix it？AMD A520/B550 mainboards’ FCH is from ASMedia, same with AMD 300/400 series. I think can use B450 mainboards’ professor related code. But how to make sure this code?

Processor devices do not appear in hardware management, which usually occurs on AMD's a520/b550 motherboard and Intel's 600 series motherboard. This situation occurs from XP to win7. It will be work well from win8 beta 6.2.79xx or above. I tested 6.2.7880 and will not display it. I tested 6.2.7973 and can display it. I tried to replace modified acpi.sys with the old version, but Win7/beta7880 still doesn't display. Maybe my mod acpi.sys modification is incorrect. Mod BIOS may be fixed..

I had tried to port the win8.1 usb driver on win7, but failed. WIN8.1 usb driver need kmdf 1.13.