Tuesday 5 June 2018

shutdown - strange cpu temperature - reasons

I encountered a rather strange issue:


I have an Intel Coffee Lake, Core i9 9900KF 3.6GHz running on a MSI MPG Z390 GAMING PRO CARBON. Couple of hours ago I decided to check temperatures (for no reason, I just do that once in a while on game breaks) and msi command center was reporting 255 celsius cpu temp, 255 celsius mos temp, and I think the voltage was messed up also (not sure though, didn't make a print screen - unwise).


Since I was just finishing a gaming session I know there was no throttling, no reboots or any normal high temperature signs. Also at 255 degrees I'm pretty sure something would've melt (or at least smell like hell).


Since 255 is highest 8 bit number I assumed this may have been a sensor reading error.


I restarted and check bios and cpu temp was a casual 40 degrees. So I blamed command center but after restart all was fine there also.


So... any ideas what happened here? If it was a faulty sensor why didn't I encountered throttle (and shut down - temp is huge). If it was a software issue why did it go away without doing anything?


The scenario where a sensor reports a huge temp and pc doesn't shut down is what worries me most (even if the sensor is faulty, I prefer experiencing shutdowns / throttle than completely destroying my system or even worse, having a fire hazard right under my desk). How can I mitigate this?

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