4790k 80+ degrees @ 1 Volt

Antony1995

New member
Hello everyone,
Just received my H100i and installed it in my rig, and I'm getting temps of high 70's to low 80's at these settings:

CPU Multiplier: 40 Manually set
CPU Vcore: 1.000 Volts Manually set
Turbo Boost: Disabled
H100i: Balanced

Idle temps are high 30's low 40's

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I've been testing with OCCT LINPACK 64bit, AVX and All logical cores.

I've also tried the H100i fans on max but no change.

I've remounted the H100i several times and tried two different thermal pastes:

Arctic Cooling MX-4 and Gelid GC Extreme

The fans are in pull mounted in the top of a ARC Midi R2.

Any thought what might be the problem?

Thanks,
Antony :)
 
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i know it might sound like a random question but what temp was you getting with the stock cooler?

Was getting up in the 70's with the stock cooler but I never really pushed it because I knew I couldn't handle the heat.

I have now figure out it was the back plate not doing up tight. So have now spaced it on the back of the mobo with some washers and getting around 50-55 max now :)
 
Was getting up in the 70's with the stock cooler but I never really pushed it because I knew I couldn't handle the heat.

I have now figure out it was the back plate not doing up tight. So have now spaced it on the back of the mobo with some washers and getting around 50-55 max now :)

i was just going to say, try remounting it, i remember having problems mounting the H100i to a Z87 and a Z77 motherboard...
 
What temps are you getting now, Idle and load ? :)

I'm overclocked to 4.5 Ghz at 1.175 volts, idle 35 +- a few degrees and load about 75 which I think is a bit high, but I only had just a little bit left of MX-4 so don't think I have enough on there really. so going to have to get some more.

If I go up to 1.2 volts it goes over 80, so probably a bad mount and not enough thermal paste. but working well not anything major to worry about. :)
 
I'm overclocked to 4.5 Ghz at 1.175 volts, idle 35 +- a few degrees and load about 75 which I think is a bit high, but I only had just a little bit left of MX-4 so don't think I have enough on there really. so going to have to get some more.

If I go up to 1.2 volts it goes over 80, so probably a bad mount and not enough thermal paste. but working well not anything major to worry about. :)

My last 4770K at 1.32v at 4.60GHZ went up to 78'c under full load, You definitely a bad mount there.
 
Wait, why is vring at +0.3V?

I'm not sure is that bad? I don't know what that is so I haven't touched it in the bios. I've only changed Vcore voltage.

EDIT: Just checked the Bios and V ring voltage is on AUTO what should I set it to?

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EDIT2: Just changed it to normal and set the offset to 0.000 and HW Monitor now reads as 0.000

EDIT3: Found half a tube of MX-4 I forgot I had and remounted again several times but still hitting 70 odd degrees. I'm really puzzled why I'm getting these temps. Is my CPU not that great or is something else going on.
I have tried various methods of apply thermal paste but had the most success with the pea/rice grain method and am getting good coverage. Even with the stock fans at max still getting high 60's/low 70's.
 
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Are you sure that the H100i mounting system is applying enough force? No bends or something?
 
It seems to be okay with the washers, the backplate has little to no play before mounting the pump/block and the whole thing is pretty rigid once the pump is on.
I could try putting washers between the top plate and thumb screws to see if that makes a difference but I don't think it would tbh.
 
Is the radiator clean? Pump and fan speeds?

Remember that AVX stressing cause recent intel CPUs to get really hot. Have you tried other stress tests?
 
Rad is clean as is the whole system. Fans are at 1500 RPM but they go up and down as they are in balanced mode in corsair link. Pump is 2230 RPM according to HW Monitor and 2330 RPM in Corsair link, So not sure why there's 100 RPM difference but I'm pretty sure it's definitely working.

I haven't tried any other tests, I wasn't aware AVX was causing CPU's to get really hot. I'll give prime 95 ago.

EDIT: As soon as I started Prime95 straight to 85 degrees :(
The pipes and rad aren't warm at all so maybe the pump isn't working but why am I getting an RPM readout from it..

EDIT: Has to be the pump if I stop the fans just by holding them there is little to no temperature change. Looks like an RMA is in order
 
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I can't think what else it can be. I've just added another washer to the backplate so now there's 3 washers and the original on each screw mount, so that should give plenty of pressure right?
 
assuming your using one of the accepted thermal paste application methods (small blob. draw a line or make an x) when you remove the water block was the paste spread out as you would expect?
 
Yeah, I've been using the pea/rice grain method and it spreads out as it should. A nice even circle right in the middle of the CPU spreading towards the edges. And I know I'm not putting to much on because I've done the exact same thing before and no problem.

I'm just getting a bit frustrated with it atm :/

EDIT:
Okay let me start over.

The backplate has 3 washers and the original on each screw mount on the back of the mobo. There is absolutely no play once done up with the posts on the top side of the mobo.

I've been using the pea/rice grain method for thermal paste and it seems it's been spreading correctly.

I have tightened the thumb screws finger tight and with a screw drive with no change.

I've also tried push and pull with the fans no change again. The fans are connected to the H100i fan controller and controlled by Corsair link, in balanced mode.

The H100i was powered by a molex to sata connector with the system fan controller also connected on the same cable from the PSU. But now the h100i is powered directly via a sata power cable with nothing else connected from the psu. But still no change.

The pipes and rad don't feel warm at all, whether under load or idle. Both pipes feel around the same temperature.

I am getting a pump RPM reading of 2330 in HW Monitor and 2230 in Corsair Link, fan RPM varies but on average around 1500 at idle increasing under load.

None of the mount is bent or loose when done up.

I haven't had any experience with water cooling before, so I am a bit confused with what's going on.

My current settings are 4.5 Ghz @ 1.200 volts, Turbo is disabled, the voltage and clock are manually set in the bios. The temperature sits in the 70's under load, testing with OCCT LinPack AVX 64Bit all logical cores. If I test with Prime95 the temperature rockets into the 80's.

What sort of temperature should I expect at this volts? and are the Pump and fan RPM's good?

Despite having a reading for the pump I still think it's the problem as the pipes don't seem to warm up at all. I'm pretty sure the back plate issue is solved with the washers as there is no play at all when it's done up, unlike before there was significant play.
 
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