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Cooler Master HAF 932, i5-2500k, overheating issues

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April 29, 2012 10:10:52 PM

I have a brand new system, with a HAF 932, i5-2500k, and a Hyper N520 CPU cooler: http://www.coolermaster.com/product.php?product_id=5983. Mobo is the ASRock Z68 Extreme3 Gen3.

It came with the rear exhaust fan pushing air out, and the Hyper N520 upside down and pulling air from the back and pushing it into the case. It was running hot, in the 80s on full load.

So I reversed the rear exhaust fan to pull in. Helped a little, ran around 75-82 on full load (Degrees C).

But that still is not acceptable, so I turned the rear exhaust fan back to its original pushing direction and turned the entire CPU fan around to pull from inside the case and blow the hot air into the rear exhaust fan. It now looks like this:
http://img.photobucket.com/albums/v626/nsmikle/DSC00052...

(Not my actual system). Now it runs into the mid 90s on full load before I shut it down. I had the CPU fan reseated and thermal paste reapplied before that test.

Now it's with a repair shop who are trying to figure out what is going wrong.

What could be wrong? Which directions should my fans be blowing? Could it be something like a heat sink? I understand that I should be idling in the 20s and full load no more than 60 or 65. I checked and the voltage is fine, and I'm not OCing.

Any help would be greatly appreciated!
April 29, 2012 10:14:17 PM

the pick you linked is correct. fan pushing air across and cooler and into the rear exhaust fan.

what is the room temp in your PC room?

is the 2500k over clocked? if so, to what?
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April 29, 2012 11:38:15 PM

The room temp is in the 60 degree F range, so not hot at all.

I haven't OCed it or messed with the voltage at all.
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April 30, 2012 12:04:50 AM

Yep I believe the optimal config for the fans is for front and bottom to draw air in, with rear and top to blow it out. Optionally, you can reverse the top fans if you don't have a bottom fan but that is not ideal for air flow around your graphics card. Of second order importance is positive versus negative pressure. Positive is better because it gives you more air molecules wanting to take the heat away. However, you should avoid any situation where fans blow against each other in an attempt to create positive pressure. This results in the flow of air cancelling out, and flow rate is more important than pressure.

Your case is fine and your cooling seems fine. If your heat sink is correctly fitted, the only suggestion I have is an obstruction on the exhaust. I did notice that temps are dramatically affected by the direction of the CPU fan, when I fitted mine incorrectly so worth double checking. My i7 runs around 70 at 4.9 ghz under prime, using a noctua dh 14, which I understand is quite normal. Other possibilities maybe see if you can try a different cooler or perhaps even the temp sensors are faulty.
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April 30, 2012 12:09:05 AM

Well clearly something is wrong. There is no obstruction to the fans. It should not be running at anything around 80, much less 90. It is in the "optimal" setup that it hits 90+.
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