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Unusually High Load Temps

post #1 of 9
Thread Starter 
As the title suggests I'm been getting some unusually high load temps on both my cpu and 2 gpu's. On the CPU I'm averaging around 75c running FoH and on the GPU's I'm averaging, at around 63c running furmark. Room temp hovers around 23-25c

CPU + GPU Spec's
CPU i7: 920 @ 4ghz @ 1.415v
GPU(s): x2 EVGA GTX 680 Superclocked @ factory clocks

Cooling Hardware:
CPU Block: Swiftech Apogee HD
GPU Block(s): XSPC Razor GTX 680's
Radiator(s): AlphaCool NexXxoS UT60 360mm and XT45 120mm
Fan's: GT AP-14's running @ full speed in pull
Pump: Laing D5 @ Speed lvl 3
Case: HAF 932 with 200mm front and side intake fans
Coolant: EK-Ekoolent-Clear
Fittings and tubing: 3/8 ID 5/8OD Compression's and Primochill A-LRT tubing

Loop order:
Res - Pump - CPU Block - 360 rad - 120mm rad - GPU Block - GPU Block - Back to Res

Steps taken to try and resolve this:
  • Bought Faster fans (from AP-13's to AP-14's)
  • Checked and remounted CPU and Both GPU Blocks
  • Maxed out pump speed
  • Changed tubing from Tygon R3603 to Primochill A-LRT
  • Dusted out both Rad's

Picture of system:



Is there anything else I can lower temps by a decent margin (ie. more than 8c) that doesn't involve more radiator's because unless I mod the HAF 932 there's no more space left. I could try push pull but its not going to fully work on the triple rad since theres not enough room for leftmost fan. Or is a 360 + 120mm worth of Rad not enough for i7 920 with that level of voltage and 2 GTX 680's? I'm willing to buy a new case if thats needed FYI.
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post #2 of 9
I think the rads cant keep up. Can you mount a bigger rad outside the case just to see if that is the issue?
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post #3 of 9
You need to measure your water temperature while under load or you will be just guessing what is happening. An ordinary household medical thermometer should do.

Stick it in the res while the system is running under load with the doors on the case ... or just as it normally runs. If it is high water temps then more rad or faster fans, or changing the airflow layout will help. If it is not then there are other problems.
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by Apexii22 View Post

I think the rads cant keep up. Can you mount a bigger rad outside the case just to see if that is the issue?
I don't have an extra rad to test right now. Was thinking of getting XT45 Quad rad when the Enthoo Primo case shows up in Canada as I was considering a case upgrade anyway.
Quote:
Originally Posted by Jakusonfire View Post

You need to measure your water temperature while under load or you will be just guessing what is happening. An ordinary household medical thermometer should do.
Stick it in the res while the system is running under load with the doors on the case ... or just as it normally runs. If it is high water temps then more rad or faster fans, or changing the airflow layout will help. If it is not then there are other problems.
Actually my Res has a temp probe built in to it. When the CPU load test was running the water temp maxed out @ 29.7c and when the GPU load test was running water temps maxed out @ 35.5c
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post #5 of 9
Quote:
Originally Posted by Rollergold View Post

I don't have an extra rad to test right now. Was thinking of getting XT45 Quad rad when the Enthoo Primo case shows up in Canada as I was considering a case upgrade anyway.
Actually my Res has a temp probe built in to it. When the CPU load test was running the water temp maxed out @ 29.7c and when the GPU load test was running water temps maxed out @ 35.5c

Ok, good. So that is a perfectly good 10C air to water delta. More rad is not going to help much.

GPU temps 30C above water temps can only mean either very bad mounts or perhaps a very bad flow rate, but even an awfully low flow should not result in temps that high.
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post #6 of 9
I know you wrote that you checked and remounted your blocks, but is it possible you forgot to peel the backing off of both sides of the thermal pads when mounting your GPU blocks? It's an easy mistake to make, & you sure wouldn't be the first to do that and report unusually high GPU temps.
post #7 of 9
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

Ok, good. So that is a perfectly good 10C air to water delta. More rad is not going to help much.

GPU temps 30C above water temps can only mean either very bad mounts or perhaps a very bad flow rate, but even an awfully low flow should not result in temps that high.
Well I will check the mounts for the gpu blocks again as I don't think its the flow rate as I can see lots of movement of the water flowing through my res. Maybe too little TIM on the gpu core perhaps?.
I will mention one more thing as well, the air flowing through the rads when the water reached 35c was quite warm.

As for the CPU, is there anything else I can do?
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by Unicr0nhunter View Post

I know you wrote that you checked and remounted your blocks, but is it possible you forgot to peel the backing off of both sides of the thermal pads when mounting your GPU blocks? It's an easy mistake to make, & you sure wouldn't be the first to do that and report unusually high GPU temps.
I will check for that when I check the blocks but given the loop is 8 months old and if thats the issue shouldn't that mean more than high load temps like stability and artifactting issues for example?
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post #9 of 9
Thread Starter 
Update

Well this kinda explains why my cpu temps were a little on the high side.



Remove, reapply and remount and I get these sort of temps running FoH (Water temp maxes out @ 28.5c)


Now I haven't been able to check the GPU blocks yet but for the CPU is there anything else I can do to lower temp's by a decent magin or is that about as good as it gets?
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