Overclock.net banner

Questions about Intel i7-6800K Air Cooling Temps

4K views 10 replies 3 participants last post by  doyll 
#1 ·
I just built a new PC using an i7-6800K and have doubts about the temps. (You can find the specs in my signature, It's the PleaseIgnore build.)

So I wanted to get the CPU to 4.3Ghz. To achieve this I had to do 1.302 on the Vcore for it to be stable.

With the Cooler Master Hyper 612 Ver. 2and Artic MX-4 thermal paste I was getting 31C idle and 80C peak running IntelBurnTest.

Thinking that was a bit much, I wanted to up the game and get a Dark Rock Pro! cooler capable of dissipating 250W TDP apparently.

Installed it, which was a nightmare, with the same thermal paste (MX-4) and ran the tests again, and similar results, 29C Idle and 80C peak.

Is this normal for this CPU/Cooler setup? Ambient room temps are about 26C.

The Case has 2 Corsair AF120s in the front pulling air, 1 in the back of right behind the CPU cooler pulling air out and another 1 right on top of the CPU cooler pulling air out.

tl;dr i7-6800K with be quiet! DARK ROCK PRO 3 Silentwings temps peaking at 80C on synthetic benchmarks.
 
See less See more
#2 ·
Have you monitored the temperature of airflow going into the cooler? Because without knowing that air temperature we really don't know how well the cooler itself is performing. We only know how the system is performing with that cooler installed. the delta of CPU based on temperature of the room .. and room temp is always lower then cooler intake air temperature. If it is less the 5c warmer your system is flowing air quite well, but it is often twice to four times that .. and every degree warmer the air going into cooler is basically translates into a degree warmer the CPU is.

How long from starting a stress test is it before CPU temps peak?

You many find "Ways to Better Cooling" linked in my sig of interest. 1st post is index, click on topic to see it. 5th topic is a good place to start.
 
#4 ·
Quote:
Originally Posted by sly cooper View Post

dude its a 6 core 12 thread processor and youre pumping 1.3v on core at 4.3 ghz 80c is pretty normal for those chips

the fans on the darkrock pro have super low static pressure as well so thats most likely also contributing
The fans are well matched to the cooler.

The overclock is definitely contributing, but if the airflow to cooler is 10-15c above room and we improve case airflow so it is 5c or less, the CPU temp will be 5-10c lower, maybe even a little more.

I ran my i7 920 @ 3.9Ghz under my Dark Rock Pro 3 at 70c in 25c room no problems. Similar temps with i7 980 @ 4.0GHz.
 
#5 ·
Well, I don't have anything to measure that right now. Ill give it a shot. Room temp is 26C. The air inside the case feels about the same, with the air flowing in from the front.

I was running the tests again on IBT, it takes about 5-6 seconds to reach 70C and then after running for a couple more runs it reaches 78C (This time it only peaked at 78C)

With Prime95 running it took about 10-12 secs before the temps reached 80C the case fans are running at full at that point at it seems to not go past 80C. It only peaks there abouts, the cores are running are 75-78C at that point.

And I'll check out your threads. Thanks.
 
#6 ·
I was expecting a good 5-10C change when going from the Cooler Master Hyper 612 Ver. 2 to the be quiet! DARK ROCK PRO 3 Silentwings cooler.

And seeing the temps I was worried if the contact with the CPU IHS was good enough. The Dark Rock Pro cooler was a lot harder to install then the Cooler Master one, so was also worried if I messed up the install or something.
 
#7 ·
Quote:
Originally Posted by BandonStorm View Post

Well, I don't have anything to measure that right now. Ill give it a shot. Room temp is 26C. The air inside the case feels about the same, with the air flowing in from the front.

I was running the tests again on IBT, it takes about 5-6 seconds to reach 70C and then after running for a couple more runs it reaches 78C (This time it only peaked at 78C)

With Prime95 running it took about 10-12 secs before the temps reached 80C the case fans are running at full at that point at it seems to not go past 80C. It only peaks there abouts, the cores are running are 75-78C at that point.

And I'll check out your threads. Thanks.
I have a feeling your airflow is okay.

Honestly, both are 6x 6mm heatpipes and similar fin pack area. 2-4c and probably a little quieter is what I would expect. What kind of temps are getting in normal use?
 
#8 ·
@doyll, Under normal use, gaming I've not seen it go past 54C on HWMonitor (I've been constantly running it ever since I built it)

Also, I took down the clock to 4.2GHz @1.275v which seems to be much cooler.

Now I feel a bit better with the temps. So after 3 hours of Prime95 Its Peak at 73C. And doing like handbrake video conversion or AIDA64 stress test, it only peaks at 63C.

I can probably lower the voltage a bit more, need to play around with it more when time allows.

Coming from Water Cooling, these temps seemed a lot to me, but I guess they are not too bad after reading around. And the PC is near silent on idle and normal loads. Only running stress tests actually, make it even audible.

Idle temps are now 28C. Which is less than before, it seems that every day that passes the idle temps are dropping lol.

So far so good.
 
#9 ·
Quote:
Originally Posted by BandonStorm View Post

@doyll, Under normal use, gaming I've not seen it go past 54C on HWMonitor (I've been constantly running it ever since I built it)

Also, I took down the clock to 4.2GHz @1.275v which seems to be much cooler.

Now I feel a bit better with the temps. So after 3 hours of Prime95 Its Peak at 73C. And doing like handbrake video conversion or AIDA64 stress test, it only peaks at 63C.

I can probably lower the voltage a bit more, need to play around with it more when time allows.

Coming from Water Cooling, these temps seemed a lot to me, but I guess they are not too bad after reading around. And the PC is near silent on idle and normal loads. Only running stress tests actually, make it even audible.

Idle temps are now 28C. Which is less than before, it seems that every day that passes the idle temps are dropping lol.
73c peak are not bad at all. I assume in Handbrake the 63 peak means most of encodeing is at about 60c?

Sounds like it might be TIM seating in better. The heating / cooling cycles help spread and thin the time so there is less between the surfaces The thinner the TIM / more metal to metal contact the better the heat transfer.

My i7 6700K started out running hotter than I expected, but over a 4-6week period it came down about 5c. The so called 'experts' all said ti was IHS to cooler TIM seat, but I mount a lot of coolers and do a lot of testing. This i7 6700K is the only CPU I've ever had that behaved like this. I guessed it might be the TIM between CPU chip and IHS, but no way to prove it.
 
#10 ·
Yep. Seems to be like that. I'm much more happy with these temps. I might have put slightly more TIM then I had to in the first place, after reading your guides. But temps seems stable now. Not much variations .

Initially, I was even considering getting the CPU water cooled again. But the silence of having a good air cooler is just priceless to me. Under most loads the fans don't even have to go past 40%.
 
#11 ·
Quote:
Originally Posted by BandonStorm View Post

Yep. Seems to be like that. I'm much more happy with these temps. I might have put slightly more TIM then I had to in the first place, after reading your guides. But temps seems stable now. Not much variations .

Initially, I was even considering getting the CPU water cooled again. But the silence of having a good air cooler is just priceless to me. Under most loads the fans don't even have to go past 40%.
I'm using rice size dob on my 6700K with great results. When changing coolers there seems to b no 'seat time/burn in time' The temps I get when starting up with new cooler are the same as 2 day or a week later. I try to run test/review coolers for an extended period before I decide what my 'impression' of them is. Often things become more noticable after a few days than in a few hours worth of use. Not that cooler performs or sound any different, but after my ears become more accustom / used to hearing it in use I notice things I didn't in initial impression.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top