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Uncooled CPUs

SlyReaper

SlyReaper

SlyReaper

Soldato
Joined
26 Apr 2008
Posts
6,653
Location
Bristol, Old Blighty
Suppose I took off my CPU heatsink and switched my computer on. How long would it take before the computer shuts down from overheating? Would it even get past POST?
 
it would be way past 90C before windows had finished booting... and shutdown. With recent intel CPUs you'd probably be ok but with older CPUs especially AMD they tend to go up in smoke.
 
i once did this accidentally with an amd 939 chip when i did not secure a heatsink properly. The chip was visibly scorched in seconds! I was just lucky it did not take my motherboard with it
 
Depending on what your motherboard does when the cpu overheats, for me it turned off (heatsink was misaligned by accident) almost instanting as soon as i got into bios (passed post fine) watched the temps go from about 30c to 100c in seconds and then it powered off the pc.
 
I once did this while rebuilding an old system for my dad. I was interrupted several times when nearly completed and when i finally got back to it a couple of days later I'd forgotten where I'd got to. Quick look in the box showed everything in the right place and looking good to go. turned it on and saw windows starting to load when the phone rang. Took me ten minutes to get off the phone and when I returned there was a very nasty acrid smell and a rather dead Pc. Turns out I hadn't connected the heatsink fan power lead! One very dead (and smelly) Athlon 2400+ and a dead mobo too. It probably died very quickly but was completed toasted by the time I got to it!

Very good lesson though :)
 
EvilOne said:
I remember those old AMD chips, they didnt put the instructions to shut down if its running too hot on the CPU so they would run quicker then the intel equilents (less instructions). Everyone seemed to know about this so they didnt try them without a heatsink lol, or atleast i did.
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I suppose that AMD have fixed this with it's latest 64 bit CPU's though :confused:
 
trust me, after having that happen to me using a water cooling system where the pump blew without my knowlege until i turned it on, the processor shutdown in under a minute and im actually supprised that it did'nt burn out the cpu.
 
mythrandyr said:
trust me, after having that happen to me using a water cooling system where the pump blew without my knowlege until i turned it on, the processor shutdown in under a minute and im actually supprised that it did'nt burn out the cpu.
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I've forgotten to switch thepump on before now, no big deal, it slowly heats the water in the whole system! :D
 
jesus, you can tell the difference in the frame rates on that video between cooled and uncooled. anyone remember the old 486's? they ran so slow you never had to put a fan on the old things, now they're a meuseum peice.
 
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