Installed new motherboard and cpu and computer keeps going off.

i just installed a new motherboard and processor on my computer. it will turn on fine, let me edit bios, etc. after the computer has been on for a certain amount of time it will just shut off. i dont think the cpu is over heating cuz it came with heatsink grease. please help me if you can. also if i get to the point of trying to load windows it will just turn off. i think thats because i need to reinstall os because i need different drivers(please correct me if im wrong on that). also all the part i have exept for motherboard cpu and video card were from a computer a bought(emachine) if that makes a difference. if you need any other info about my system just ask and i will gladly tell you.

 

What processor, what mother board? Did you follow instructions exactly on the thermal compound (grease)? At first glance this sounds like a heat sensor is shutting it down.

 

pentium 3 3.2ghz and the mother board is a elitegroup 848P-A. it looked like there was already thermal compound applied to the cpu and there was was nothing else in the box. it said it came with heatsink.

 

OK, it's a thermal pad. It melts between the processor and heat sink.

You said there was nothing else in the box. Did you actually put a heatsink and fan on it? It would be obvious. It's big and would have a fan on it.

 

Also, are you aware that the board is designed as a server? Also you stated that the processor was a P3. I assume that's a typo as it's too fast and you meant a P4.

 

yes forgot to say i did attach the fan and heatsink. ya that was a typo.

 

Figureing that you have the box open and can see that the fan is running, go to the bios and see if there is a monitor that will show the processor temperature. ( I want to rule out thermal )

Report operateing temps here.

Also see if there are bios settings to shut down at a certain temp. If so, post that number also.

Don't try to run it till it shuts down. For an example if it tends to shut down after 5 minutes, report the temp after say 4 minutes and send those numbers. On second thought, if the temp remains in the 40-50s degree C range, let it go and report the numbers as close to the shut down as possible.

It may be possible that it's a false thermal shutdown. Could be, if the board will take a wide range of processors, that the bios is set to shut down at an over temp for the slowest (coolest) processor and may need to be adjusted for a faster (hotter) processor.

I need to go for now. Check back later.

 

the shutdown temp. is disabled. most of the time it was running around 90 degrees celsius.

 

90 degrees is WAY to high! Do not run or try to run this machine as it is. Although it may already be too late for the processor.

I would check two things.

1) Is the polarity of the fan plug right?

2) Pull the heatsink and get rid of the thermal pad and get some good thermal compound like arctic silver or the like and follow instruction very carefully and don't be in a hurry to apply it.

Cross your fingers as with the bios overtemp protection shut off I would say the shutdowns are being caused by the processor getting to hot to operate.

In my opinion if you get it to run sucessfully you will be lucky. And the news gets worse. With the processor that hot it's possible that it may have caused damage to the main board.

Sorry to be the bearer of bad news but I think it's a valid opinion.

All I can say is to get the thermal compound and check the fan polarity. Don't even turn this machine on until you do so.

I do assume that you got a fan and heatsink that is rated as compatable with the processor.


I need to be gone for the night but will keep an eye on this thread.

 

thank you very much for your help i will get a good thermal compound.