CPU temps after water cooling

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khkarl

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Nov 26, 2013
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Good day guys,

I've recently decided to ditch my C2D rig to build a new one from scratch and after reading all the heat problems with Intel's Haswell chips, I decided to take the plunge literally and installed a closed loop water cooling kit.

I have a few questions but here's my specs first.


    i5-4440
    MSI z87-G41
    Corsair H80i
    MSI GTX760
    The rest is just a mish-mesh of SSD, optical drives and mech hdds.


The temp diff between the H80i sensor and my cpu sensor is about 12°C and the H80i sensor reads pretty close to room temp at 32°C(I live in the tropics) while the CPU sensor reads about 42°C at idle. At load when running stress tests, the CPU temps can get up to 60°C while the H80i temp reads 38°C max. is this normal?

Also I fitted the rad of the H80i with the hoses downwards and the water block hose upwards. Since i figured that the rad doubles as a res I should let the air pockets get trapped where they are no where near the inlet. Please see the pic. The pic is an earlier one I've since re-position the waterblock inlet and outlet to face upwards.

iazh.jpg


I was using the stock intel cooler initially and the cpu temp only reach 65°C at loads. So am I doing something wrong here or is it normal?
 
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khkarl

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Nov 26, 2013
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ok.. will try that. Thanks.. 5mins of stress should be enough?
 
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Azrael47

Azrael47

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Jun 1, 2013
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Use HWMonitor also check your BIOS for the definite temperature, you could simply have a faulty sensor, very common. Also with HWMonitor it usually records two temperatures relating to the CPU. the CPU socket temperature (tends to be hotter by 10c) and then the core temperatures.
 
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khkarl

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Nov 26, 2013
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After running Prime95 for approx 20mins. CPU core temp level is around 65-70°C, Package temp is also within 1-2° difference. Coolant temp is around 40°C.

I guess it should be normal?

9hls.jpg
 
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khkarl

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Nov 26, 2013
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I think so too. Something is seriously wrong. I can't seem to find the cause of it.

The fans are working and in the right orientation. The pump is working as well. Double checked the thumb screws for the brackets and they are secure as well. There's no free play on the waterblock too.
 
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khkarl

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Nov 26, 2013
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Yes... I did that.... I use proper cleaning agents and procedures.

Anyway I fitted the stock cooler and runing prime 95 now,

It's consistently clocking 80+°C So I guess the H80i is doing it job. Just not as well as what the marketing says.
 
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khkarl

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Nov 26, 2013
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I guess its pretty much that's it for this H80i.

Stock coolers is putting out 80+°C @ ambient temp of 27°C

H80i is putting out 70+° @ ambient temp of 27°C

and Corsair's box says they are getting 47.94°C on a Ivybridge i7-3770K @ 4.6GHz on 100% loads.

I guess it would be fair to say that the H80i is working as it should.
 
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khkarl

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Nov 26, 2013
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the cpu only allows to adjust the blck from 100 to 103. anything more it just freezes.

Anyway I found the cause of the high temps. I over tightened the thumbs screws which resulted in some parts of the block not having good contact.

I discovered this while running Prime95 small FFT. It's quite a harrowing experience to see the temp reach 100°C. Don't ask me why I did it. It was just a hunch.

Now it's idling at 37°C with ambient of 29°C
Small FFT with the same ambient is clocking average 65°C
 
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