How will the operation of the CPU change if one transistor fails?

Question

Electronics

Can a transistor fail over time on a CPU?
How will the processor work in this case? How will its performance change?

Answer 1

Maybe.
Like any electronic circuit. Either it will not work at all, or it will formally "work", but with errors of varying severity.
Performance has nothing to do with it.

Answer 2

Keep in mind that all modern processors are multi-core.
If in the cache area, then an error correction mechanism usually works there and there will be nothing from the loss of one transistor.
If in the logic area, then most likely the BIOS will detect this and mark this core as corrupted, so performance will decrease. If it does not detect, then the computer will work with strange errors (as far as I understand)
Processors are tested before they leave the factory and yes, if there are errors in the logic, then such a percentage will be written off