CPU Cooling Issue

Matt_194 · Jun 10, 2017

Hi all,

I am having some problems with CPU Cooling.

My day started with my PC blue screening a couple times with the error WHEA_UNCORRECTABLE_ERROR which i know is down to the CPU.

So i checked the temps and realised my CPU was sitting at 60c idle. I decided to give my cooler a clean out and apply new thermal paste. (I have a 5820k @4.5Ghz 1.35v and Corsair H100i GTX AIO which is refurbished).

After doing so I checked temps again and they went back down about 35 - 40c idle for a couple of hours.

But now, the idle temps have risen again to about 55c and I cant even run cinebench as the temps fly straight up to over 90c which crashes my PC.

I am looking for some help on the issue, im thinking it might be my thermal paste which is fairly cheap (Akasa 455). I have had it a while and i keep it in my room which gets quite warm on a daily basis or could it be the pump in my AIO?

Please help, I would ideally not like to fork out for a new cooler but will if I have too ....

Thanks

parker_307 · Jun 10, 2017

how long ago was this purchased?

drkatz42 · Jun 10, 2017

Mmm...with the temps you're reporting I believe there's more going on than just older thermal paste. As long as the paste easily comes out of the tube , it's likely just fine. The culprit imo is the AIO.

mcnumpty23 · Jun 10, 2017

yes my guess would be the pump

thats assuming that it all worked ok before

if you only just installed it then improper mounting would also be a suspect

Matt_194 · Jun 10, 2017

Okay well I bought the AIO early last year so it has been in operation for a little over a year. I was thinking it would be AIO as it is refurbished as well!

Matt_194 · Jun 10, 2017

It is definitely seated properly, i cant tighten the screws much more without putting serious pressure on the pins

mcnumpty23 · Jun 10, 2017

Matt_194 :

its not just how tight they are that matters

its if you dont tighten them gradually in a X pattern sometimes this causes the block not to sit flat

but if it worked ok for a year then the pump is most likely

you should be able to monitor the pump speed with that corsair to see if the pumps actually spinning or not

Matt_194 · Jun 10, 2017

yeah it was working fine and I do like to do it in X pattern thats the way I have always done it.

When I look in the Corsair software, I have the pump on full rpm and both fans are spinning as well. They seem to be working but not nearly as well as they used too.

Matt_194 · Jun 10, 2017

So I just ran cinebench again and my temps rocket up to 90+ and a blue screen.

I have always been able to run cinebench on this OC, I guess that does mean pump isnt working like it should.

Would you agree?

mcnumpty23 · Jun 10, 2017

Matt_194 :

what rpm is it reporting for the pump?

Matt_194 · Jun 10, 2017

3040 rpm, thats as high as it will go, i tried to doing the lower rpm setting as well and that made the temps worse as you would expect.

mcnumpty23 · Jun 10, 2017

Matt_194 :

then its not your pump

and its a sealed unit so shouldnt be a lack of coolant issue

so only leaves the mounting or the thermal paste

Matt_194 · Jun 10, 2017

well in that case it would have to be the thermal paste because it was absolutely fine yesterday, the before and the day before that etc ...

It started blue screening as soon as I turned it on this morning and tried launching a game.

The thermal paste is use is https://www.scan.co.uk/products/akasa-ak-455-high-performance-thermal-compound-15g-syringe-24-w-mk-thermal-conductivity-for-cpu-gpu-

mcnumpty23 · Jun 10, 2017

thermal paste does sometimes dry out--ie in the computer-- i didnt mean if it was sitting in a drawer

that stuffs ok might not get the last extra degree or 2 off your temps like more expensive stuff

but its still adequate

Matt_194 · Jun 10, 2017

hmmm so what would you suggest, could I maybe have air bubbles in my radiator or something?

mcnumpty23 · Jun 10, 2017

Matt_194 :

no its a sealed unit so no air can get in there

i would replace the thermal paste

and double check the block mounts flat just to be safe

usually you can check that--if your case has a cpu cut out like most

look at the rear of the cpu socket--ie behind motherboard

look at the 4 screw holes your block is mounted through

and see if all the screw ends come through the same distance

Matt_194 · Jun 10, 2017

Okay, I will have a look, thanks for the help

mcnumpty23 · Jun 10, 2017

Matt_194 :

you are welcome and can always come back if you dont get sorted

main thing is the pumps spinning so you dont need to fork out cash on a new unit

Matt_194 · Jun 10, 2017

Me again :L ... I did everything you said, re-applied thermal paste, re-seated the pump making sure I went in an X pattern and my temps are still sitting near 60c and temps rocket up during cinebench.

This must surely mean my cooler isnt working properly?

Matt_194 · Jun 11, 2017

I did some reading around last night and found another forum for people with AIO problems.

I found lots of people saying that a good way to check is testing the temp of the air coming out the radiator. I noticed that despite my cpu being at 60c, the air coming out of the radiator was cold!! So i am thinking my pump clearly isnt pushing the coolant to the radiator.

mcnumpty23 · Jun 11, 2017

if its spinning at 3,000rpm really cant see how its not moving the coolant

do both tubes/pipes feel warm?

Matt_194 · Jun 11, 2017

The pipes are warm and where the pipes join the radiator , it is very warm there as well, the radiator fins and the air coming through the rad are cool

Matt_194 · Jun 11, 2017

I have also tried shaking my pc to try and dislodge any possible blockages and that hasnt worked either

mcnumpty23 · Jun 11, 2017

if both pipes are warm then the coolant must be circulating

Matt_194 · Jun 11, 2017

I'm not sure what else to try, there is not hot air leaving the radiator, think I will be calling quits and getting a new cooler unless you can suggest anything else?

CPU Cooling Issue

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