[wtallis]

It is very rare to be able to fuse off part of a CPU core. Fusing off part of its cache is common, but other than that the only example that comes to mind is some server CPUs where Intel fused off the third vector unit.

[ComputerGuru]

Oh, right, this is part of a core not a whole core. AMD often fuses those off for lower part number SKUs.

FWIW Intel supposedly “fused off” avx-512 in alder lake though I don’t think that was what was actually done, physically speaking.