canonkong

The motherboard is ASRock Z690 Steel Legend/D5. And here is the moudle I modified from the BIOS. asl file mod.7z

@Dietmar I modified the bios, it can work on xp/win7 above now. Single core boost work fine now.

Need to modify the *inf and *sys file. *inf file is easy to modify, but *.sys need to find out the device ID check and block or over it. After modify the *sys file, you need to use EV certificate to sign it to avoid 52 error code afer installing the mod driver.

Here is some souce code about Intel AMI BIOS: Foxconn: https://github.com/killvxk/LoginDemo/tree/master kabylake: https://github.com/raywu-aaeon/KabyLake_DW08 IceLake-SP: https://github.com/liuwei142536/hamburger_Bios Maybe can help us to modify the bios.

What the debug error is? BIOS often not only one error, like my B650E mainboard, need to fix 5 errors.

@Dietmar Yes, here is the file. CPU Show.7z Original BIOS ACPI table dump:https://disk.yandex.ru/d/75Fwkvp1MmTIcA MOD BIOS ACPI table dump:https://disk.yandex.ru/d/oI9KAZEtugvrWw

@Dietmar Benchmark tests results were all right. I test few B550 and B650 mainbords, all are working fine. Single core frequency and multi-core frequency turbo, standby power and fullload power consumption，CPU thread scheduling are all right.

Modify the BIOS also can solve this CPU problem. The new motherboards usually have the BIOS flashback function, can flash the mod bios very easy.

@Damnation And I don't think ACPI\ACPI0010 is Processors device. Testing on NTOS 6.2.7962 .

@Damnation Maybe AMI force to make this.

@Damnation I had tried it, but I can not find any other device need to install driver.

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?