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High temps @ Idle after new mobo+cooler

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  • Cooling
  • Components
Last response: in Components
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July 5, 2014 4:52:00 PM

I just finished swapping in an Asus P7P55-M board (LGA 1156) and pulling my old i7 860 from this deprecated HP box. In addition to the new mobo, there is a new case w/ 2 120mm fans, and a Cooler Master EVO 212 cooler.

I got everything installed and fired it up, only to find that the *idle* temps in bios were accelerating up to 60deg/c. In the OS, with no load, it hovers around 57-60c...which is insane. Ambient temps are 74deg F in here. The CPU cooler is going at a full 2kRPM constantly trying to keep the heat down.

The voltages, according to CPU-Z, are pretty much normal, showing core voltage anywhere between 0.85 and 1.0, core at 3400ish.


After removing, cleaning and reseating the damn evo 212 about 15 times over the past few hours, there has been *no change* to the core temps. No variation of installation, or thermal paste layout, makes any difference. I can't swap in the "stock" cooler, as the bolt pattern on the HP boards are unique to them (along with the cooler) and I don't have another LGA based box close by to swap in components. I can say that, in the old box, I can achieve a 30deg/c idle with all the stock HP craptastic stuff...so it's either a severe voltage issue, or this cooler has a defect which I can't detect (it sure as hell looks like it's flat... and torqued down as far as it will go).

Ideas?

More about : high temps idle mobo cooler

July 5, 2014 11:10:48 PM

There are two problems that I can see here. If you reseated the cooler 15 times in the past couple of hours, you have A) put layers of air in between the layers thus reducing conductivity of heat B) make the spread of thermal paste inconsistent. If the above doesn't apply to you (hard to tell because the way it was wrote, 15 applications of thermal paste is a lot ;) ). Make sure you use some kind of heat paste other than what comes with the cooler because many times those get dried out through storage. Secondly, it will take some time after you apply the cooler for the heatpaste to set to get better temperatures. Also, make sure risers are on the board to ensure that the cpu cooler is able to be tightened down enough. Tighten the bolts in an x pattern, and only use about a pea sized amount of paste. Seeing that it is a new mobo, check for any kind of power settings, but yes bios will create a lot of heat with a cpu, and the temperature might stay around that area in os to keep it as quiet as possible. My 3770 stays around there in windows 8.1 with no usage, but the cpu is damn near silent.
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July 6, 2014 6:43:47 AM

Each time it was re-seated, the contact points were cleaned. It doesn't have 15 layers of grease on it. Back plate and top plates were both tightened in cross pattern, and show level. Using the pea method, line method or old school spreader method made zero impact.

Seeing how the heatsink is essentially passive, there is no way it is at fault. Even if you just smear on grease and clamp it down with reckless abandon, there is no way the efficiency would drop that much to cause a 80deg c spike with no load on a cpu. It has to be the board. Just for grins, I took the CPU back out and installed it on the HP board with the stock intel cooler. 35deg/c all day long, with 50deg at high load. CPU is fine.

There are no settings in the bios which look incorrect, however I has issues actually saving the bios. Each reboot, it will prompt you to go back in and set items, even after flashing to latest. I can't get a clear shot with my infrared thermometer to get an accurate reading of temps right on the cooler die to see just how hot it's getting. I'm going to RMA this board.
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July 6, 2014 8:15:33 AM

I was say that it is the cooler. It isn't exactly passive since there are the heatpipes, which I would say are the problem. I would say they how home are DOA, either by damage or factory error. Some of the liquid could have come out at a certain point, or the heatspreader isn't attached properly to the heaypipes. I would RMA because you are installing the cooler like a champ.
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July 6, 2014 9:30:50 AM

@Fishwithadeagle -- I'm going to toss in a water cooling system from a friend of mine tomorrow just to be sure. It's from his i7 950, which has always performed flawlessly with the cooler combo. Crossing fingers that it's something simple, but prepared to RMA board if needed.


Right now, with stock cooler, each core is at 33-35c as reported by RealTemp (@idle to 10% util).
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