CPU running too hot at idle (5820K & H115i)

Dan_P

Dan_P

Dan_P

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Hi all,

I'm hoping you can help me, i think my CPU is running far too hot at idle and has been for some time.

Currently, have fans to 100% at idle and seeing temperatures on the CPU package of between mid 50s to 70s, this can't be normal? I don't remember it being this high before. I have cleaned the fans and rad as best i can with canned air.

PC:
5820k default settings cooled by Corsair AIO H115i
GTX 980Ti
(Other details in signature)

 
Minibiker said:
Those temps do seem high for idle with an AIO... Have you reapplied Paste and reseated the cooler
Click to expand...
Not yet, i had a feeling this would be the answer.

It seems to just come out of the blue over the last couple of weeks. the build is 3.5 weeks old (built by OCUK)

This is after running CPU-Z for two minutes (after 10 minutes it doesnt change)
 
Something is very wrong there.

If your CPU was not in contact with the AIO, it would have shut down a long time ago. Long before you could get Prime running.
If your AIO was not in contact with the CPU, the temperature of 48.5C for idle should not even be possible.

So I too would guess like b00merang69 that it's likely the pump that's the issue. But an alternative might be your fans on the AIO. It also depends on how its been setup as well in your case. Further information on the setup will help diagnose it further.
 
Meddling-Monk said:
Something is very wrong there.

If your CPU was not in contact with the AIO, it would have shut down a long time ago. Long before you could get Prime running.
If your AIO was not in contact with the CPU, the temperature of 48.5C for idle should not even be possible.

So I too would guess like b00merang69 that it's likely the pump that's the issue. But an alternative might be your fans on the AIO. It also depends on how its been setup as well in your case. Further information on the setup will help diagnose it further.
Click to expand...

I don’t know how to see if the coolant is circulating as it’s a closed loop AIO. Looking at the Corsair software it shows the pump rpm But other than that not sure what to check.

What about the fans on the AIO? I’ve checked they are spinning and are clean as well as the radiator - the best I could anyway with air as to not brush the rad and damage the fins.

the AIO is mounted in the top of my case with air being pulled through the rad and out. Hope that helps

thanks for your replies
 
Before you try anything, unplug the AIO and refit its connections to the motherboard (for the fans and the AIO pump). See if that helps. If not, then...

First try the reseat and repaste option first that was suggested. Although I'm fairly certain the repaste option isn't the issue, the reseat might help.

Then if it fails. Try this:
Temporarily pull out the fans to prevent them to vibrating the tubes on the AIO. Power up, then touch the tubes of the AIO and try to feel if there is any vibration flow from them as well as temperature variances (one should be in theory cooler than the other). If there's none, the likelihood is the pump has died or something has become blocked in the AIO, restricting the flow heavily. If this is the case, RMA the AIO if still under warranty.

Also, you say that your AIO is mounted at the top in Exhaust (pulling air from inside case to throw out the top), I'm going to assume that you have enough Intake fans (bringing in cooler air from the outside of the case to the inside) fitted to the front or bottom of your case, correct? If so, likelihood of issue remains the pump. If not, then it might be an airflow issue that you need to look into.

For quick reference, my 4930k at 4.3Ghz with the H100i (original), the H100i hit 42-44C at load (with crap fans at super low settings and virtually no cool air coming in to the AIO) when it was still fitted on the 4930k, there's no way your chip should be idling your H115i at 48.5C unless the fans aren't spinning or the pump has failed (or there's a blockage of some kind inside), or there was no cool air coming in. Since you've checked the standard stuff already ahead of us, again, I'm going to guess the pump is the issue in some way. How old is the AIO?
 
Meddling-Monk said:
Before you try anything, unplug the AIO and refit its connections to the motherboard (for the fans and the AIO pump). See if that helps. If not, then...

First try the reseat and repaste option first that was suggested. Although I'm fairly certain the repaste option isn't the issue, the reseat might help.

Then if it fails. Try this:
Temporarily pull out the fans to prevent them to vibrating the tubes on the AIO. Power up, then touch the tubes of the AIO and try to feel if there is any vibration flow from them as well as temperature variances (one should be in theory cooler than the other). If there's none, the likelihood is the pump has died or something has become blocked in the AIO, restricting the flow heavily. If this is the case, RMA the AIO if still under warranty.

Also, you say that your AIO is mounted at the top in Exhaust (pulling air from inside case to throw out the top), I'm going to assume that you have enough Intake fans (bringing in cooler air from the outside of the case to the inside) fitted to the front or bottom of your case, correct? If so, likelihood of issue remains the pump. If not, then it might be an airflow issue that you need to look into.

For quick reference, my 4930k at 4.3Ghz with the H100i (original), the H100i hit 42-44C at load (with crap fans at super low settings and virtually no cool air coming in to the AIO) when it was still fitted on the 4930k, there's no way your chip should be idling your H115i at 48.5C unless the fans aren't spinning or the pump has failed (or there's a blockage of some kind inside), or there was no cool air coming in. Since you've checked the standard stuff already ahead of us, again, I'm going to guess the pump is the issue in some way. How old is the AIO?
Click to expand...

thank you for your advice. I will try this at the weekend.

the pc was built by ocuk including the AIO 3 and a half years ago, it’s been working great up until recently when I have noticed the increased fan noise and temps. I’m sure in the past I remember idle temps in the late 20s and load of around 60 but can’t find any old screenshots as proof.

there are three fans on the front bringing cool air in and 1 fan on the back exhausting which is the config it has been working with fine and as built by ocuk.
 
Yeah, sounds like air isn't going to be the issue.

Your AIO (H115i) should be covered still by Corsair Hydro Series of products (non X versions) Warranty, which should be 5 years from time of purchase. So if confirmed its a problem with the pump, then it should be fairly simple to get the RMA done for it when it comes down to it.
 
Dan_P said:
5820k default settings cooled by Corsair AIO H115i
Click to expand...

Another thing to check is the fluid level. AIO coolers gradually lose fluid over time. After you've tested for pump problems per @Meddling-Monk dismount the radiator and give it a shake to guage how much fluid is left. You could also weigh it: the whole assembly should weigh 2 Kg.
 
Just realised I never updated this thread.

I checked all connections and fans and all were seated and running correctly. I replaced the thermal compound and reseated the cooler and things seem to have improved.

Idle temperatures sit between 33-40c at 4Ghz Overclocked with the fans running at half the speed as before.

I’ve ran CPU-Z for 15 minutes at 100% load and temperatures never exceed 65c. So although I don’t think it’s as low as it used to be, I can’t be certain so I’m happy enough with that performance.

Thanks all for you help and advice.
 
For awareness, within a week of replacing thermal compound and reseating the cooler - idle temperatures are increasing to now 45-50c and load temps to 100-103c.

I have opened a support request with OcUK for help.
 
That's unfortunate, it does sound like it was the AIO then, when you first reseated it, it probably dislodged whatever it was inside it that was blocking the AIO, and now after settling after use it got stuck again. Hopefully OcUK can get you a direct swap or a short RMA time.
 
My money is on a dead pump. I have had 2 h115i fail with this issue and you will get very high idle temps when this happens. The last one I replaced with the h115i pro around 6 months ago and the fans are much improved on this model (I always swapped out fans on the h115i because they were so loud but there is no need with the pro)
 
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