What I’m talking about is: Is it possible that under certain circumstances the CPU “buggs” and suddenly responses 1+1=2?
- In which parts of the computer can that happen (HDD, RAM, Mainboard)?
- What could be the causes? Bad quality? Overheating?
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Does that even happen? When yes, how frequently?
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If everything is okay with the CPU (not a single fault in production, good temperature), can that still happen sometimes?
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What would be the results of, let’s say one to three wrong computations?
This is programming related as it would be nice to know if you can even rely on the hardware to return the right results.
It can happen in all hardware; it happens quite often in RAM chips. There are mechanisms to detect and correct such errors, but in regards to RAM, only in the more expensive ECC chips. See Wikipedia’s article on RAM and Error Correction
Also interesting is the article on Error Detection and Correction in general.