Constant CPU overheating

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Joey109

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Mar 3, 2016
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Rig Specs:
i7 6700k
Asus maximus viii hero
Corsair h100i gtx
GTX 1070


Pretty much ever since I built this machine I’ve had slightly higher cpu temps from what I was reading online. I’ve gone through 3 Corsair H100i gtxs over the past 4 years and I’m on my 4th one and there are noises coming from the pump. I run Aida64 stress test and within 5 seconds my cpu throttles. It seems like everything is functioning according to Corsair link. I wondered if maybe my thermal paste application was wonky so when I got this new cooler (maybe 3 months ago?) I decided to just leave the stock paste on and not mess with it in case it was user error. I don’t really notice any issues when I’m using the computer except sometimes when I’m playing a game, it will just freeze and I have to force it to shutdown. I’ve never been able to pinpoint what caused the crash and there are no signs leading up to it. I have no idea what’s wrong and it would be nice to finally have a computer that had no hardware issues. Any advice is greatly appreciated!

 
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Karadjgne

Karadjgne

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Screen freezing isn't usually associated with the cpu, that's usually a gpu overheating issue, specifically the vram/VRM's.

While you've said the results, you've not said anything about the setup. How is the h100i hooked up, to what power, which direction are the fans, is it exhaust or intake, top or front, what other fans are in the case, what case, what rpm is the fans at during overheat, what rpm is the pump at.

The more information you can supply, the less there is to guess at.
 
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Joey109

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Mar 3, 2016
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I’ve never noticed any issues with my GPU overheating but who knows.

I don’t understand what you mean by how it’s hooked up. Everything is hooked up properly and “works”. I have the radiator fans set up as intake on the top. My case is an NZXT phantom 410. I have two intake fans on the front, the two rad intakes on the top, exhaust on the back, intake on the bottom, and an intake on the side that’s right in front of my gpu. Basically anywhere I can put a fan has one to try and get the temp down. I had everything manually ramped up to the max when I ran the stress test. The pump I remember was at 2200 maybe?
 
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rodolphe.viard

rodolphe.viard

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Feb 27, 2018
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Hi Joey109,

If a CPU throttle within a second with an AIO >> Pump Failure

Normally, where are your temps? CPU and Water?

You have too much intake compared to exaust. So they are fighting each other to get some air "IN".

Air want to go where there is no resistance so air is not really passing through your radiator or not as much as you want it...
This leads to higher water temp, reducing the lifespan of your Pump.

For air flow the general tip given is intake on front and bottom, Exhaust is on top and back.


Rodolphe
 
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Karadjgne

Karadjgne

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Agreed. What you are basically doing is treating your pc like a balloon that won't pop. All that air in, and next to nothing out. Radiator on top should have the fans set to exhaust orientation, does not matter if on top of rad in 'pull' or underneath in 'push'. Because of intake orientation currently, you are blowing the heat back down towards the gpu, which had those nice side fans blowing heat up, so the heat is not really making it out of the case, just circulating. This'll mean all that hot air is being recycled through the gpu fans, making the gpu heatsink far less efficient.

There's multiple ways to hook up an AIO. But there's only 1 thing that's absolutely necessary. The cpu_fan header must be populated. This is almost always done by the 4pin wire from the pump. Whether you use the Corsair link, and the supplied USB is up to you, it's not necessary. You can also run the fans directly to the cpu_fan header via 2way splitter and power the pump from a sys_fan header that's set in bios at 100% fan duty, no Q-fan control. The pump on a h100i was designed for a constant 12v, it's not intended as a variable speed pump.

As to the pump, it came with 2x sets of standoffs, I believe one set is black chrome looking, the other is silver, you should be using the silver set as they are for Intel mobo's, the black set is for amd. There is a slight difference in height, if you use the wrong set the pump won't sit firmly on the cpu, and a loose pump is next to useless at removing heat.

Stock thermal paste on the pump is mediocre. It's far better than many, not as good as some, so perfectly acceptable for the application. Big brand names like Arctic Silver 5 are not necessarily any better, often worse. This only applies to 'wet, sticky' paste, if it's dried out, it needs changing. Going to assume since this is multiple different applications, you have followed proper procedures and thoroughly cleaned the pump/cpu between uses.
 
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Joey109

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Mar 3, 2016
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Ok I’ll check the numbers and stuff when I get home. My thought process for the fan set up was to bring as much cold air in as possible and have the one exhaust in the back. I’ll have to do that on a day off since I have to take everything apart because of the case set up. Hopefully this will help or improve the situation. I really hope it’s not a pump failure. Like I said, this is my 4th one since I’ve built this machine. I sent a ticket with the recording of the sound into Corsair but haven’t heard back.
 
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Karadjgne

Karadjgne

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I've never seen anyone with many issues on one particular piece of hardware that's been replaced this many times. Although count yourself lucky, I guess, you bought Corsair and they are doing right by you. If you'd had this issue with another brand, you might have been SOL.
 
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Joey109

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Mar 3, 2016
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I don’t know if I’m just getting super unlucky or what but I assume the units have been defective for them to RMA. Maybe they just don’t want the hassle and it’s easier for them to just send me a new one. Next time I have an issue I’m just gonna pay someone to look at and fix my computer. =\
 
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