@Overclocking - I remember hearing a while ago that overclocking can cause said hardware (is that the right term? I'm not much of a computer person >_> ) to "crash and burn" - not literally - and therefore make the computer inoperable? Is that true?
It is possible, but rare. You know when you reach the limits, 'cause the computer begins to crash during the stability tests. You then bring the speed back to the last stable setting (in fact, a bit more towards the safe limit, just in case) so it runs stable.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )