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Water cooling high temps - Page 2

post #11 of 14
He said his load is 70* for his CPU in OP.
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post #12 of 14
Thread Starter 
My loop is pump>radiator>cpu>GPU>Reservoir>pump

the waterblock is the "MC-TDX for Intel I7/Nehalem/1366"

And to do a full bleed i just need to keep it running for 24 hrs? Ive been using it quite a bit for almost a week, should I leave it for 24 straight?
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post #13 of 14
Any chance of some pictures? They really help in diagnosing the problems.

What are you using to record the temperatures and test the system?

If it is air in the loop then you need to run the pump and tilt in every direction, just running the pump for a few hours (or even a few weeks) isn't going to get the air out. Radiators are the worst culprits for holding air. Remember that air wants to go up (obviously) so try to tilt the rad so that the outlet is at the highest point.

You said that you mounted the CPU block a few times with the same results, so it is unlikely to be a bad mount (although still possible). When you took the block off was there a good, thin spread of TIM on the chip? If not then there might be problems with the mounting hardware or setup.

Is it possible to measure the temperature of the water? It doesn't matter at what point in the loop, although the res might be the easiest point, as the water temperature doesn't vary by much through the loop. A simple mercury thermometer is good enough, measure the ambient temperature and then water temperature as close together as you can, time wise, whilst running a stress test, also record the CPU temperatures during this time. This will give you an idea of where the problem is:

High water temperature => Your rad isn't dumping the heat well enough. Possible bleeding issues, not enough rad, high ambient temperatures or poor airflow

Low water temperature => Your CPU block isn't picking up the heat well. Possible bad mount (discussed above), poor CPU block, low flow rate or, as always, bleeding issue.

If you can't measure the temperature, turn the system off and let everything cool down (overnight for preference), then fire her up and run a test immediatly. Does the temperature start low and work up? Does it start high and work up or does it start high and stay stable?
Edited by GingerJohn - 3/19/11 at 12:17am
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post #14 of 14
Thread Starter 
ok so I finally figured out the problem! What was happening was the cpu cooling block was defective and the copper was ever so slightly bowed. I'm not sure if it was a factory defect or if I somehow tightened the screws too tight and did it myself but I noticed that the thermal paste was barely touching in the middle of the block and most of the contact was being made on the edges. So thank you all for your wonderful help! my temps are now areoung 33C idle and a max of 50C full load after 12 hours of testing! These are the temps I was looking for! Thanks again!
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