CPU 100 degrees Celsius in bios.

ilostmyaffro · May 15, 2016

Hello guys,

After a series of 4 power cuts in about 40 seconds I found my cpu cooler at 2200rpm. Went into bios and saw that the cpu temp was at 100 degrees. Thought it was some error with the temp measuring part so I opened the case up and I could both smell and feel the heat emanating from the cpu! I have left the computer turned off but am puzzled as to what could've caused this issue.

I am using a i5 6600k no oc.
Asrock z170 extreme4.
Cooler master seidon 240m.

The desktop is about 6 months old I think.

DonkeyOatie · May 15, 2016

I would go into BIOS and see what the Vcore voltage is. Skylake allows the motherboard much more flexibility for voltages and something may have 'glitched' to an unsafe high level. You could be running your CPU at an extremely overvolted level.

GhislainG · May 15, 2016

ilostmyaffro :

If it worked fine for 6 months, then the cooler most likely has failed.

ilostmyaffro · May 15, 2016

I reset the cmos values and went into bios. cpu voltage was at 1.034v but I saw the temperature still rapidly rising from 42 to 55 in less than 30 seconds..

DonkeyOatie · May 15, 2016

55C is safe. 100C is dangerous.

If the voltage is low (1.034) and the idle temperature is 55C, then there is something wrong with your cooler.

If the pipe from the block to the radiator is not very warm, then there is a heat transfer problem.
If the pipe from the radiator to the block is warm, then the radiator is not cooling properly.
If there is a measurable temperature difference between the pipe from the block to the radiator, between the block and the radiator, your pump is not moving enough fluid.

Other possibilities exist too,

SkyNetRising · May 15, 2016

Faulty cooler, perhaps?
Or pump not working, CPU cooling block not properly secured.

13thmonkey · May 15, 2016

42 to 55 is not unusual, there are very few power saving features in bios. You could have poor HSf installation, not enough pressure. I see you have an all in one, perhaps the pump died?

ilostmyaffro · May 15, 2016

13thmonkey :

The temp was at that range only because I left the computer on for a very short time.
To check this I just went and turned it back on and left it on bios and saw it's temp rising by 0.5 degrees every 1~2 second I watched it till 70 then turned it back off. It would've likely shot up to 100 as before if I left it on.

Installation shouldn't be a problem. As I have stated its been working fine for the past 6 months, sudden problem after the power cuts...

ilostmyaffro · May 15, 2016

SkyNetRising :

I placed my hand on the tubes and the pump and felt it working.
There was vibration within both like liquid churning inside.

GhislainG · May 15, 2016

It simply has failed; the pump probably no longer works properly. Since it's under warranty, you could RMA it.

Edit: If the pump works, then the cooler is not making good contact with the CPU.

InvalidError · May 15, 2016

ilostmyaffro :

The simplest explanation and a common failure in many liquid cooling solutions is a pump failure.

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