CPU reaching 90°C

Undora

Undora

Undora

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9 Oct 2009
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14
Recently I purchased new parts for my new rig. These being:

Gigabyte GA-P55M-UD2 Intel P55 Mobo.
Intel Core i5 750 2.66GHz CPU.
CoolIT Eco A.L.C. Heatsink.

After installing them in my comp. and checking everything was ok, I turned it on and went straight to the BIOS menu to check for the CPU temperature (had several issues with my previous rigs where I had not placed the heatsink on properly, so I check quite often :p) and saw it was reaching temperatures around 85-90°C :eek: :( !!

I immediately turned the comp. off and proceeded to re-install the heatsink and re-applied the thermal paste (AC MX-2 Thermal Compound). Turned it back on and still had the same BIOS temperature readings :confused: :mad: !

By now I had given up on the CoolIT Eco A.L.C. heatsink and used the stock heatsink the CPU came with. This obviously was an improvement as the BIOS was reading around 55°C. While installing Windows 7 I realised that the back fan wasn't working (it did move, but only slightly). I came to the conclusion that my current PSU (AK-P100FG) wasnt providing enough power to the mobo and therefore wasn't providing enough power to the CoolIT Eco A.L.C. leading to the CPU overheating (the CoolIT Eco A.L.C. has two 'plugs'. One that goes from the fan connected to the radiator to the CPU_FAN mobo pins and another that goes from the actual cooling unit to the SYS_FAN mobo pins). I ordered a new PSU, a OCZ StealthXStream 600w, installed it and the CoolIT Eco A.L.C. heatsink and.......well....no dice :(.

So after all that here comes my question. What the hell am I doing wrong?!?!
Thanks for any advice/help in advance :).
 
Try plugging the fan in another header and check that the unit is properly mounted, making full contact with the CPU. Make sure that the screws are tightened.
 
The Gigabyte GA-P55M-UD2 Intel P55 only has two headers, the CPU_FAN header and SYS_FAN header...so just swap around? I'll give it a try and come back with feedback.
 
Ok so far the BIOS is recording 31°C. So switching the plugs around must have worked. That or my heatsink wasn't on properly :p. But that's strange, atm i've got the fan plugged into the SYS_FAN header and the pump recieving power from the CPU_FAN header, which is the opposite of what it tells you to do in the instructions :confused: . Oh the system temperature is recording 34°C....im guessing thats fine? Btw how can I know the pump is actually on and receiving power? Does it make a sound similar to the fans?
 
I think what he means is that if the pump wasn't working, your computer wouldn't be running because of the lack of heat transfer, hence thermal protection kicking in.

Some programs like PC Wizard or HWMonitor might pick up if the pump is running properly based on the RPM read out from the fan header. Or even BIOS will do that for that matter. Mine registered 4000 RPM so check if yours is around that.

Also, what load temps are you getting at the moment. Idle temps are not reliable in showing how good a cooler is.
 
Just checked the RPM of the pump in the BIOS and yeah your right its around 4000 RPM. Temps when on medium load (about 50% on each core) are 45°C, not bad at all...
 
Well so far everything seems to be working fine. Just liked to say thanks again for all the great advice. Don't use forums that much, but after this I might :D.
 
Hi Undora, are you reading the right fan setting in the Bios, if your pump was spinning at 4000RPM it would burn out in no time -

CoolIT Fan
High reliability, Quiet 12V
Speed: 1800 RPM MAX

Download HWMomitor and check the speed with that, choose the right one for your OS + one that has > no installation next to it(it still run's just click on the HW.exe when you have extracted the file)

http://www.cpuid.com/softwares/hwmonitor/versions-history.html
 
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