Crazy fan behaviour

Eldento

Honorable
May 7, 2013
2
0
10,510
Hello, first post here as can't find what i need on other threads. I've recently changed the case my build is in to provide more room for cooling etc. Since i moved the components across to the new case my system has been behaving out of the ordinary.

Occasionally when i press the power button, the CPU, SYS and GPU fans spin up to maximum and the screen remains blank. I can't switch it off using the power button i have to switch off at PSU.

It started a couple of weeks ago and initially i thought it was because the tower was standing on carpet and my PSU couldn't suck up enough air from underneath the case. I moved it onto a cabinet and it behaved normally for a week, now however it has resumed previous state.

System is as follows:

PC P&C Silencer Mk3 600w
Gigabyte H55M U2DH
i5 760 2.8
Corsair 8GB XMP
Nvidia 8800GTX OC Edition

I did replace thermal paste on the cooler (arctic freezer pro 7) when i changed towers but my cpu temps are normal 31-37c when running fine so didn't think that was an issue.

Anyone have any ideas?

Thanks
 

clutchc

Titan
Ambassador
My initial thought, sadly, is a defective MB. You might try resetting the BIOS or even pulling the CMOS battery and using the CLR RTC jumper to return the BIOS to factory settings. But intermittent issues like you describe sound like something MB related.

But having said all that, it is not carved in stone. Any faulty device could cause issues also. Gfx card. PSU. RAM.
 

Eldento

Honorable
May 7, 2013
2
0
10,510


Ok so weirdly since i posted my question the issue has not occured. If it returns i will reset cmos and perhaps check psu for continuity and scorching. Thanks for your reply.

Eldento
 

clutchc

Titan
Ambassador
Previously I forgot to mention that you should NEVER set your PSU on a thick carpet if it has a bottom mount PSU with the intake fan under it. So it is a wise thing you did to move it up to a table or cabinet. If you must set it on the carpet, set it on a piece of flat material like a board to provide air space.