CPU too hot?

Potato Joe · Mar 8, 2016

I got a 5820k after my 4790 died, and I can't help but feel it's running hotter than it should. Even at stock speeds, after a few seconds of Prime95 the CPU is at 92°C! The cooler is a Thermaltake Water 3.0 Ultimate. During games, the temperature never exceeds 65°C though, which is still high considering the cooler, I think.

Ironsounds · Mar 8, 2016

Hello... As a "simple test" take a cover off your case, and report your CPU New temps.
1) Where is the water cooler/fan mounted and direction of AIR flow for it?

firefoxx04 · Mar 8, 2016

Do not run prime95 on processors that have the AVX instruction set. The CPU dynamically increases the voltage when prime executes AVX code. The temp is normal for Prime95+AVX but it is way too hot.

You should use X264 stress test. https://www.dropbox.com/s/qjn1gddvet100wn/x264%20Stability%20Test%20V2.rar?dl=0

The link is from my personal dropbox.

I prefer 70* and less but will accept 80*C and less. Once I go over 80* I take action. 90*C is technically safe but you should be concerned.

srimasis · Mar 8, 2016

92°C is definitely in danger zone, but prime 95 doesn't represent real life scenario. If your cpu temps don't go over 65 during gaming, then its completely normal. The TDP of 5820k is 140 watts compared to 84 watts of 4790. So yours is pretty normal situation.

DonkeyOatie · Mar 8, 2016

Prime95 26.6 and earlier are OK. What version were you using?

That combination of parts should be a bit cooler than that if your CPU is at stock.

Potato Joe · Mar 8, 2016

DonkeyOatie :

I'm using the latest version. Also, I've been using some generic Cooler Master thermal paste, and I ordered some Arctic Silver last night. There should be a drop in temperature there (I hope).

DonkeyOatie · Mar 8, 2016

Do NOT use Prime95 more modern than 26.6. so lets forget that.

65C under normal gaming is a bit higher than I would expect, but a lot depends on waterblock installation, fan speed, in-case airflow if the radiator is an exhaust, and case placement, room airflow, and ambient temperature. (and pet hair

)

Ironsounds · Mar 8, 2016

Hello... With thermal paste "Less is better" the best thermal transfer contact is metal to metal... And just a thin film across your CPU and heat sink will fill the surface microscopic Pits and not prevent metal to metal contact. But if the CPU lid and Heatsink are not Flat to each other, more thermal paste is needed to fill the bad mating surfaces, and you will see high temps. It is not un-common for People to Dress and LAP those surfaces for precise/better surface mating.
The Artic Silver uses silver particles in it, and will help best with bad mating surfaces.

Potato Joe · Mar 8, 2016

DonkeyOatie :

No pet hair, lucky me. Ambient temperature of the room is 27°C, radiator is an exhaust from the top of the case, room airflow is virtually nonexistent. The fans are spinning at full speed (2000 RPMs) pretty much all the time.

Ironsounds · Mar 8, 2016

Hello... Ya having 80F room air is tuff too cool with... As the Laws of Physics ( Thermal Dynamics ) dictate... you can not cool lower than what you are using to cooling with. B ) next step is a portable Freon Water Pump cooler... very common in the Industrial environment.

Potato Joe · Mar 8, 2016

Ironsounds :

Having 80F room air is pretty good at cooling 180F liquids in a radiator.

DonkeyOatie · Mar 8, 2016

Yes, but a 70F room would be better, so the temperature of the room is contributing quite a bit to the somewhat higher operating temps. Coolers deliver 'degrees above ambient' the higher the ambient, the higher the block temperature.

Ironsounds · Mar 8, 2016

Hello... The Engine and fuel system need higher temperatures to work... The thermostat maintains a high water temperature, Yes there is larger water capacity, water flow, and Copper/alum cooling fin area... and Could maintain Cooler temps... But your Engine and fuel system would run like crap. It is typical to change your Thermostat between Seasons to maintain a good running engine for your fleet.

When you see all that steam coming off of factory roofs, that their 'water Cooling' towers... They run water cooling piping all over the buildings for various equipment... massive PUMPs and water Pits. Air Cooling alone would not keep up with the High pace of heat generating processes.

Potato Joe · Mar 8, 2016

DonkeyOatie :

A 10°F difference in room temperature won't get me the 20°C difference I'm looking for.

Ironsounds · Mar 8, 2016

Hello... did ya try take a cover off? Your GPU is the Biggest generator of heat in your case, where is the that hot air going? an External Exhaust GPU fan will throw that HOT air directly outside your case.

DonkeyOatie · Mar 8, 2016

You should not be expecting 20C lower. An idle in the low 30s and a loads in the mid to upper 50s is what you should expect, and extreme stress around 80C.

Potato Joe · Mar 8, 2016

DonkeyOatie :

My idle temps are where my load temps should be.

Edit: It's idling in the upper 40s/lower 50s

DonkeyOatie · Mar 8, 2016

This is the first time you have mentioned that. That certainly is a problem.

1. Check the waterblock mounting for good paste and firm and level attachment.
2. Check that the pipe out from the block is hot and the pip out from the radiator is cool.

Potato Joe · Mar 8, 2016

DonkeyOatie :

One of the tubes certainly feels warmer than the other, but I wouldn't describe either as cool.

DonkeyOatie · Mar 8, 2016

If the tube going back into the waterblock is not very close to room temperature, then your block cannot cool properly. This suggests that your radiator needs to perform better. Possibilities are slow fans or crud between the fins.

Potato Joe · Mar 8, 2016

DonkeyOatie :

I cleaned out the radiator this morning and the fans are all pushing air through the radiator quite nicely. I can feel the air coming out the other side.

DonkeyOatie · Mar 8, 2016

Maybe your fans are spinning too slow or there is insufficient air going through them, or the intake air is just too hot. I'm not there to see. The radiator works best when the incoming air is as cool as possible and the radiator cools best when there is plenty of air.

Potato Joe · Mar 8, 2016

DonkeyOatie :

The fans are spinning at their full 2000 rpms

DonkeyOatie · Mar 8, 2016

Then that should be plenty. What's the temperature in the case like and is there enough air coming into the case? Does opening up the side panels help to any great extent?

Potato Joe · Mar 8, 2016

DonkeyOatie :

Inside the case is 28C, and opening the side panel doesn't help at all.

CPU too hot?

Reputable

Champion

Distinguished

Distinguished

Champion

Reputable

Champion

Champion

Reputable

Champion

Reputable

Champion

Champion

Reputable

Champion

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Share this page