2 ms·

In theory. I've heard many unscientific anecdotes of CPUs being killed this way. My understanding is that in a liquid cooling system without flow, or with no co

by dTal 7y ago

In theory. I've heard many unscientific anecdotes of CPUs being killed this way. My understanding is that in a liquid cooling system without flow, or with no cooling system attached at all, delta-temp over delta-t is so high that the thermal cutoff circuits might not react fast enough before other parts of the chip have been damaged - especially if the chip is under load at the moment of failure. On the other hand, a heatsink provides a decent amount of passive cooling all by itself, so when the fan fails there's a buffer that slows the rate of heating to a safe margin.

leeter 7y ago
That is incorrect, the thermal protection circuits operate well in advance of the actual junction death temperature. Usually 20C or so minimum on mobile and more on Desktop. The CPU will throttle like mad first to save itself and then just reset the computer assuming the BIOS doesn't block the boot in the first place.
mint2 7y ago
My be quiet heat sink is giant and came with two fans. And I have the ability to add a third. If one of the two fans fail i’d guess temps may raise a few degrees and that’s it. I could even manually test it with one fan and light loads to check one fan performance.
BubRoss 7y ago
Modern CPUs adjust to their level of cooling. They don't 'burn up' even if there is no heat sink at all. What you are saying sounds like it is either fear based hyperbole, rumors from over 20 years ago, or both.
bitL 7y ago
My TR4 II 360 OC AIO's pump failed recently; it took about 1 hour of intense Deep Learning training to reach 100 degrees at which point the motherboard shut down. I was dumbfounded about what was happening, then after ruling out Titan RTX, power supply etc. problems I noticed a slow climb of CPU temperature. AIO manufacturer didn't even ask for anything and sent a replacement right away and computer is happily number crunching again.

by dTal 7y ago

leeter 7y ago

That is incorrect, the thermal protection circuits operate well in advance of the actual junction death temperature. Usually 20C or so minimum on mobile and more on Desktop. The CPU will throttle like mad first to save itself and then just reset the computer assuming the BIOS doesn't block the boot in the first place.

mint2 7y ago

My be quiet heat sink is giant and came with two fans. And I have the ability to add a third. If one of the two fans fail i’d guess temps may raise a few degrees and that’s it. I could even manually test it with one fan and light loads to check one fan performance.

BubRoss 7y ago

Modern CPUs adjust to their level of cooling. They don't 'burn up' even if there is no heat sink at all. What you are saying sounds like it is either fear based hyperbole, rumors from over 20 years ago, or both.

bitL 7y ago

My TR4 II 360 OC AIO's pump failed recently; it took about 1 hour of intense Deep Learning training to reach 100 degrees at which point the motherboard shut down. I was dumbfounded about what was happening, then after ruling out Titan RTX, power supply etc. problems I noticed a slow climb of CPU temperature. AIO manufacturer didn't even ask for anything and sent a replacement right away and computer is happily number crunching again.