Does anybody have any experience or knowledge of what happens when a PSU fan suddenly dies while the unit is on? Do PSUs generally automatically turn off when that happens, or do they continue to run and heat up until they fry themselves and the rest of the components along with them? I have a six year old PSU that has run (estimated liberally) about half of all elapsed hours during that time. Lately it's been sounding somewhat louder than it had been. I would rather replace it now than court disaster. Thanks in advance to respondents, and I ask your forgiveness if this question has been asked before.