CPU fan running at high speeds for no reason!! :'(

[Darklink908]

Greetings friends
I have a bit of a problem with my pc. My cpu fan (the giant fan on the back of the case) is running extremely loudly at around 5000rpm. The thing is, the increase in speed from normal to extreme usually occurs during gaming (with the occasional at startup.)

This lead me to assume that it has to do with temperatures. So I downloaded a bunch of different temp software (such as msi afterburner, hwmoniter and speedfan) to check the temperatures when it was idle or ingame. When idle my temps are around 40-50 which is pretty normal for my computer (at least I hope so). When I play a reasonably demanding game - say guild wars 2 for instance - my gpu temp is around 60-70 (which again is pretty normal for me). My CPU temps, however, can increase to 80 or even 90c. Speedfan reads my cores as being 80+ for the majority of the time I am ingame and I am curious as to why this is as well as a little scared that my computer may be about to get out of hand.

My brother has an exact copy of my pc (Alienware Aurora R3 with a Nvidia Geforce GTX580 and Intel i7 2600 processor) and it has no problems at all.

I am positive that my fan is not supposed to run at 5000+rpm ingame, but I want to know what could possibly cause it to do so. I do not think my computer is overheating, as my brothers cpu temps are around 70 ingame and his fan does not go crazy. This change in fan speed has happened only recently I might add.

If anyone can give any assistance to this matter I would be eternally grateful
Thanks in advance

 

[wolverine96]

The CPU fan is not the fan in the back that you can see without opening the case. The CPU fan is on the motherboard, covering the CPU. It is actually a heatsink with a fan mounted onto it.

Check the heatsink to see if it has a lot of dust in it. This will do exactly what you described. (And I know, the computer I'm using right now needs the CPU heatsink cleaned.)

 

[scout_03]

this system is liquid cooled then check if your pump work and still plug in the system .

 

[terry4536]

Your system shouldn't be running that hot at idle. The CPU heatsink may be full of dust. The CPU heatsink may need to be reinstalled with new thermal grease. Some of the case fans may need maintenance or replacement. At idle your CPU should be in the neighborhood of 30C.

 

[scout_03]

post a picture of the inside with the cpu .

 

[PatMcA]

I have a HP M7658n that I use for simple home use, surfing, etc....no intense gaming or high power crunching. When the power supply went, I replaced it with an inexpensive Kentek 400w ATX P/S. The cpu fan then ran high constantly. Cleaned it all out and redid the cpu thermal paste with Arctic Silver, reset the CMOS.....all to no avail. Researched power supplys and decided that the EVGA 430w 80+ was a good try. Installed it and now my computer fans run nice and quietly.