Allubz

I can chime in, got a X299 Extreme4 here with i9-10900X that does the same (20threads but 21 registered). Clover with APIC Patch is doable, but I'm having trouble installing...

@128keaton Welcome! Did you read the "discussed here" link in my post? It's to Tony's. Specifically page 5 post # 42 there. I think just changed the first ID to...

There are no, to me, known OC updates which fix this niche problem. It only relates to some 9800X's, as they seem cut-down sillicon from higher SKU's. Run a newer...

I recommend finding an X299 OpenCore EFI that resembles your system. Can't help with Clover. The X299 is quite the niche, and only a few CPU's have this problem. OC...