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NH-D15 on 4790k@4.4ghz temps too high

post #1 of 21
Thread Starter 
Hello everybody.
I recently bought a Noctua NH-D15 for my i7 4790k (normal settings with 4.4Ghz. Turbo)
I did Small FFTs test with Prime95 v26.6. The results: 88-90ºC (after 10 minutes).
Vcore: 1.312 (automatically managed by the motherboard).
BIOS settings: everything on auto except for the XMP profile.
Idle temps: 36-37ºC.
Room temp: mid-high, late 20s (it's all I can say since it's summer and I don't have anything to measure it with)

Rest of my system:
Thermal Paste: Artic MX-4 (small pea size method)
Motherboard: Asus Maximus VII Ranger (latest bios)
RAM: Kingston Hyper X Savage 1866 Mhz. 16 GB
PSU: Cooler Master Silent Pro Gold 800W.

I also tested games and HandBrake but my temps are almost the same as with my old 212 EVO.

I tried reapplying the thermal paste and reseating the cooler 4 times.
I'm dissapointed, this cooler is huge and expensive but I see almost no difference in performance with my old 212 EVO. I thought I'd get way lower temps like this guy who got 20 degrees less: http://www.overclock.net/t/1583740/just-switched-from-a-cooler-master-evo-212-to-a-noctua-nh-d15

Any suggestion, advice or something??? I don't understand what's wrong here. frown.gif
Edited by lenny23 - 2/11/16 at 9:58am
post #2 of 21
it might help if you tell us what case(brand / model) you are using and how many fans of what type(brand/model) is in the case. if possible let us know what orientation the fans are in (intake or exhaust) so we can troubleshoot the problem further.

it's entirely possible you got a bum chip that has poor TIM contact between the silicon and the IHS, but lets rule out some of the other possibilities before we jump to that conclusion.
post #3 of 21
Try something other then prime95, I had problems running it where my temps would go crazy high even on water. Download Aida64 trial version and give it a shot, I used my NH-D15 to cool my 4790k and was able to get it to 4.7ghz at 1.285v, I think the hottest I saw during Aida64 was something like 67c with the D15
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post #4 of 21
Thread Starter 
Quote:
Originally Posted by psyclum View Post

it might help if you tell us what case(brand / model) you are using and how many fans of what type(brand/model) is in the case. if possible let us know what orientation the fans are in (intake or exhaust) so we can troubleshoot the problem further.

it's entirely possible you got a bum chip that has poor TIM contact between the silicon and the IHS, but lets rule out some of the other possibilities before we jump to that conclusion.

It's a basic sentey case (don't remember the model), with one intake and one exhaust 120mm fan (NF-F12). I use it with the side open but it has a top vent with dust filter too.
I thought about delidding the cpu but I could kill it and void the warranty it has.
Quote:
Originally Posted by mr2cam View Post

Try something other then prime95, I had problems running it where my temps would go crazy high even on water. Download Aida64 trial version and give it a shot, I used my NH-D15 to cool my 4790k and was able to get it to 4.7ghz at 1.285v, I think the hottest I saw during Aida64 was something like 67c with the D15

I tried HandBrake. That's my real world test. I use that soft often to render vids but I get 86°c just like I did with the 212 EVO. I thought this new cooler would make the temps drop under 80.
Edited by lenny23 - 2/11/16 at 10:29am
post #5 of 21
1.312V @ 4.4GHz? That wily Asus BIOS strikes again....... Unless you got the worst of the worst 4790K to come out of the plant, that is way too much voltage at that speed. Some Asus boards are well known for overvolting CPUs. I would also bet that the load line calibration is defaulting way too high, also causing heat issues.

Also, P95 with AVX does not play with Devil's Canyon chips - causes voltage and temp spikes. But that doesn't explain your high temps Handbrake.

Try setting the CPU voltage to 1.19V and Manual - not auto or Offset. Drop the LLC to level 5. That alone should net you huge temp drops. You can play around from there with the voltage to bring it down (my 4790K will run any stress test all day at 1.12V, and never break 60C with an NH-D15).

There are probably airflow adjustments to be made, but I can't comment until you specify what you are working with.
post #6 of 21
Maybe the fans don't kick in properly?

Do you hear the D15 fans whooshing when you run Prime95? At full load they should spin quite fast (about 1200rpm) so you can hear them when you listen carefully.

Did you use any low-noise adapter?
post #7 of 21
Thread Starter 
Quote:
Originally Posted by ciarlatano View Post

1.312V @ 4.4GHz? That wily Asus BIOS strikes again....... Unless you got the worst of the worst 4790K to come out of the plant, that is way too much voltage at that speed. Some Asus boards are well known for overvolting CPUs. I would also bet that the load line calibration is defaulting way too high, also causing heat issues.

Also, P95 with AVX does not play with Devil's Canyon chips - causes voltage and temp spikes. But that doesn't explain your high temps Handbrake.

Try setting the CPU voltage to 1.19V and Manual - not auto or Offset. Drop the LLC to level 5. That alone should net you huge temp drops. You can play around from there with the voltage to bring it down (my 4790K will run any stress test all day at 1.12V, and never break 60C with an NH-D15).

There are probably airflow adjustments to be made, but I can't comment until you specify what you are working with.

I use Prime95 26.6, it's an old version without AVX instructions. With the latest the temps will be way higher.
I readed some stuff about voltages. But manual voltaje is not bad for the CPU in the long term too?? I mean in idle it will get higher voltage than Auto settings. In idle now it's at 0.752 but manual would be like twice, right??
Anyway, I'm not home now so I'll try and post results later. Thanks.
Quote:
Originally Posted by SkyFred View Post

Maybe the fans don't kick in properly?

Do you hear the D15 fans whooshing when you run Prime95? At full load they should spin quite fast (about 1200rpm) so you can hear them when you listen carefully.

Did you use any low-noise adapter?

They're running fine. They get pretty loud at 1500rpm.
Edited by lenny23 - 2/11/16 at 11:02am
post #8 of 21
Manual voltages set within the CPU's safe operating range do not affect it's longevity.

I feel like one of those crazy ROG BIOS settings should limit or change how high the voltage goes....it is probably there, but I have no idea which of the vaguely named parameters it is.
Edited by ciarlatano - 2/11/16 at 11:42am
post #9 of 21
Ya 1.31 volts is way too much for stock speeds, like I said I was able to hit 4.7 with 1.285v
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post #10 of 21
Thread Starter 
Quote:
Originally Posted by ciarlatano View Post

Manual voltages set within the CPU's safe operating range do not affect it's longevity.

I feel like one of those crazy ROG BIOS settings should limit or change how high the voltage goes....it is probably there, but I have no idea which of the vaguely named parameters it is.
Quote:
Originally Posted by mr2cam View Post

Ya 1.31 volts is way too much for stock speeds, like I said I was able to hit 4.7 with 1.285v

Yes, the BIOS has tons of options, seems made for tweakers.
If manual voltage is safe then I'll definitely try it, but tonight or tomorrow, now I'm at work in a break. I'll post results later.
Thank you guys. smile.gif
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