i7-4790K @ 4,6 GHz running hot with H115i cooler

Tomas1020 · Apr 19, 2018

Hello everybody,

it has been bothering me for a while now. I bought Corsair H115i liquid cooler for my i7-4790K which I have OCd to 4,6 GHz. MB is Gigabyte Z97 P-D3.

I cleaned the pump and applied my own Arctic MX-2 thermal paste. The results were very disappointing, under load the CPU was reaching 85+ °C. So I thought that maybe I applied the paste wrong or something. So I took it off today, cleaned it and reapplied it again.

No improvement what so ever. I use Corsair Link, pump mode is set to performance and the fan speed to 100 % (for testing purposes). I have run AIDA64 System Stability Test and CPU temps shot to 90 °C after a few seconds.

Temps are around 30 °C when idling (pump performance, fans 100 %).

These are my complete specs: SYSTEM -> CPU: Intel Core i7-4790K @ 4.6 GHz | GPU: Gigabyte GeForce GTX 1080 Ti @ 2027 MHz | RAM: 2x4 GB Kingston Fury HyperX 1600 MHz | MOBO: Gigabyte Z97 P-D3 | SSD: Kingston 256 GB | HDD: Western Digital 1 TB | CPU COOLER: Corsair H115i | CASE: Corsair Obsidian Series 750D | PSU: Seasonic Prime 80+ Gold 750W

Could anyone point me in the right direction? What could possibly be wrong?

I followed this video: https://www.youtube.com/watch?v=DBqY7s6n00s .. The guy has the same cooler, the same CPU, and the loads are 60 °C, instead of 90 °C that I am having.

Thank you very much
Tomas

t53186 · Apr 19, 2018

I had the same symptoms with my corsair AIO, found that even though all mounting hardware was tight the cooing block was NOT in full contact with the CPU, had to mess with the tabs that hold it down.

Tomas1020 · Apr 19, 2018

Thanks for the tip, but how are you certain that it actually IS in full contact?

gaborbarla · Apr 19, 2018

Hi,

Might be a faulty pump. Some people forget to plug the pump into the pump power on the motherboard, but I guess that would not be your issue. But just double check that in any case that it is secure.

Gabor

t53186 · Apr 19, 2018

Tomas1020 :

Had to push down on the block and move the tabs by hand using needle nose. The tab would hang up on the screws. My i7-3930K does not exceed 61C at full load..according to the corsair link software.

Tomas1020 · Apr 19, 2018

Well, if you mean this:
https://ibb.co/fpeXj7
Then yeah, that's connected. Doesn't seem very tight but it is connected. Corsair Link shows 2900 rpm on the pump.

Would it be possible for the CPU to stay at 30 °C at idle if the pump wasn't in full contact with it?

The Paladin · Apr 19, 2018

what voltage are you running at 4.6?

Tomas1020 · Apr 19, 2018

The Paladin :

Here are my settings:
https://ibb.co/jxfBcS
https://ibb.co/enFNj7
https://ibb.co/e4Etrn

Everything is set to Auto, I'm not very experienced OCer

The Paladin · Apr 19, 2018

Auto-OC is always going to make a cpu HOTTER than it should.
you need to learn to gauge the voltage and multiplier manually to get better results and stable system
and this will take a while.

hints, cpu vcore no more than 1.30 and cpu multiplier 47-49 is your range, depending on your lottery on cpu, but I have seen 4.9ghz on z97 boards like yours.

I currently run my 4790K on a z87 ASUS board @ 4.7ghz while at cpu vcore of 1.29 and I run while gaming CPU Temp about 65-70'c
so there is much more you can draw our of your system.
you need to use HWINFO to monitor what your system is doing and being able to identify what is causing the high heat.

look at te intersections of the blue and green boxes on the image below, that is my system but it give you an idea what to look for.
(note I used the menu and cleaned everything I did not need on the screen, so your HWINFO will be a little more spread out.

Note: this shown above is while playing a round of PUBG @1080p

Gon Freecss · Apr 19, 2018

Delid.

Tomas1020 · Apr 19, 2018

Oh perfect, I tried to tighten the pump and one of the 4 screws broke, so I can only mount 3. What should I do? Is it safe to use the PC like that?

Gon Freecss · Apr 19, 2018

Tomas1020 :

The one who told you to tighten the screws gave you an ill advice. I think you'll have to RMA the cooler.

Anyhow, you should delid.

bicycle_repair_man · Apr 19, 2018

Gon Freecss :

Advising the OP to delid their CPU is also bad advice.

OP, The Paladin is correct. Automatic VCORE will always supply the CPU with more power than it needs, leading to increased heat. As said, you need to check what VCORE the CPU currently uses and gradually decrease it until you reach a point where the CPU can run at 100% load across all threads without crashing.

Gon Freecss · Apr 19, 2018

bicycle_repair_man :

How so?

bicycle_repair_man · Apr 19, 2018

Gon Freecss :

Delidding is a risky process that even seasoned overclockers wouldn't do, much less the OP who stated that they were inexperienced. Whilst delidding, if done successfully, will result in lower temperatures, the better option for the OP is to manually set the VCORE.

theonerm2 · Apr 19, 2018

Yes. Manually set the Vcore to 1.25V and test for stability. Raise the Vcore 0.01V until it's stable if it's not stable at the voltage I told you to start at. If it's stable at 1.25V then lower your Vcore until you reach instability then raise it back up a couple notches to be safe. If it's not stable at any voltage up to 1.3V then lower your multiplier by 1 and repeat. Continue to repeat until you reach stability.

Gon Freecss · Apr 19, 2018

bicycle_repair_man :

You're behind the times. Delidding has never been easier these days. People who overclock and value it would delid in a heartbeat. You just plop it into the tool and that's it.

And even if you don't want to do it personally, you could sent it to SL for cheap and get it serviced.

Tomas1020 · Apr 19, 2018

We have some decent delidding options for approx $50 in my country. But I don't feel like investing in this CPU because I plan on buying Ice Lake when it's released.

Now my concern is the broken screw though... Is it safe to use the PC while the pump is connected only with 3 screws? I already created a ticked at Corsair website but I would really like to use my PC meanwhile...

Gon Freecss · Apr 19, 2018

Tomas1020 :

It shouldn't be that much, and it's going to be a much better experience. I would honestly recommend you to do so.

I don't think so, but you should ask more experienced people, or ask the people at Corsair.

Tomas1020 · Apr 19, 2018

Ok I will wait for somebody else to respond.

Is that possible that simply automatic VCore would cause THAT HIGH temperatures?

The Paladin · Apr 19, 2018

yes it is possible the auto oc is causing overheating

Tomas1020 · Apr 19, 2018

Well... I wish that I'd known this before I broke the screw

Thanks anyway..

The Original Ralph · Apr 19, 2018

Tomas1020 :

It's going to overheat even more now as the heatsink doesn't have good even contact with the cpu - if your temps were high before, you won't be happy to see them now

The Paladin · Apr 19, 2018

if you have the original heatsink/fan, I would use that instead of the broken corsair one, turn off auto oc and use it for now until you get your corsair back

Tomas1020 · Apr 19, 2018

Guys, I took the risk, turned it on and the temps are just tiny bit higher than usual. Still idling around 30. I won't put it under much load, just office stuff for now. I also set an alarm within Core Temp if it exceeds 80 °C.

I'll see what Corsair responds. I hope that they will send me a new set of screws, even if I'm not in the USA.

Thanks for every advice

I will try to mess with VCore when it's okay.

i7-4790K @ 4,6 GHz running hot with H115i cooler

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