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Disable specific core on AM4 B450M

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kleech View Drop Down
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    Posted: 08 May 2021 at 5:22am
Hello.
I have ASRock B450M Pro4-f motherboard with Ryzen 9 3900x. This CPU has 5th core malfunctioning. It's able to boot OS if i disable this specific core in linux kernel options. I want to use Windows, in which same is tricky, if possible at all.
Is there any way to lock or disable specific CPU core or CCX in BIOS/UEFI in this motherboard?
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datonyb View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote datonyb Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2021 at 11:27pm
should be in your user manual

or you could install ryzen master to disable ccx
[url=https://valid.x86.fr/jpg250][/url]

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ThreeDee View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ThreeDee Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2021 at 4:59pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kleech Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2021 at 7:47pm
Thank you for the replies, both were very helpful.

Originally posted by datonyb datonyb wrote:

should be in your user manual

or you could install ryzen master to disable ccx

Indeed, in the manual there should be Advanced->AMD CBS->Zen common options->Downcore control. But on my system there is no "Zen common options" for some reason, so can't boot windows, so can't use ryzen master...

Originally posted by ThreeDee ThreeDee wrote:

https://www.amd.com/en/support/kb/warranty-information/pib

I think this is my option, now waiting for the answer from RMA team.
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