Mostly, you can turn off parts of the CPU (so called chicken bits). They are invaluable for validation, but they have also been frequently used for for fixing b

Mostly, you can turn off parts of the CPU (so called chicken bits). They are invaluable for validation, but they have also been frequently used for for fixing broken CPUs. Most recently AMD just recently turned off their loop buffer in Zen4: https://chipsandcheese.com/p/amd-disables-zen-4s-loop-buffer https://chipsandcheese.com/p/amd-disables-zen-4s-loop-buffer