Yesterday a new computer that I'd bought for a friend arrived, nothing fancy, mainly just for general browsing and a bit of LoL, everything was running great till I noticed in the BIOS that the it was reporting that the CPU temperature was fluctuating between 69 and 100 degrees. It has an AMD A8-5600K and was using the stock fan. I thought it was a bit strange since it should probably idle about 30-40 degrees, I had a new cooler on the way anyways so I didn't think much of it. I got the new cooler today, installed it and the same thing happens. I downloaded Speccy and watched the temps, about 40 seconds after the computer has been turned on the temperature can be about 90 degrees, then slowly go down to 58 but as soon as it hits that it usually jumps straight up to 88-90 again and starts going down and then randomly it hits 103 and then jumps straight from it down to 49. I left the computer on for about half an hour of it doing this and put my hand next to the vent, cold air was coming out. So I'm guessing that the wrong temperature is being reported? And if not what could be causing it to get so hot as the stock cooler should definitely keep it cooler than that!
For reference I'm using this cooler, I know it's not the best but it's pretty quiet and should be more than powerful enough to cool the CPU through what he's using it for.
Best Answer +snaphat (Myles Landwehr) , 11 January 2014 - 18:30
The CPU temperature sensor is an on-die register (i.e. unrelated to the motherboard). It is highly unlikely that the reported temperature is incorrect/faulty. Isolated single function failures like that simply do not occur in manufacturing. Something else has to be wrong (e.g. bad connection to the heatsink, bad chip, etc.)
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