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by vwuon 2419 days ago
I've seen many BIOS that allow you to do that
1 comments

I've never seen a BIOS not allow that. Often called "multi-processing" or something similar in BIOS.
I've haven't seen a bios that would allow disabling all cores except for one since at least intel 2xxx series - there is almost always a switch to disable hyperthreading, but a switch to disable all cores bar one?
From my own computer. Haswell CPU

https://i.imgur.com/5xPvoPA.jpg