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Possible cpu overheat???? please help

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I just finished putting together my first system, and after checking everything over, went to turn it on. It started powering on, and the case fans, cpu fan, and p/s fan all came on. Then after a second or two, everything stopped. :Q I tried unplugging everything except for just the mobo, and it still didn't work. So then I tried changing the fsb jumper settings from 133 to 100, and it powerewd up for a second longer before it stopped. So I'm thinking maybe it's a protection against overheating. But would my retail XP2100+ overheat that fast?? I haven't done anything to it. I'm using the heatsink/fan that came in the box with the pre-applied compound. Any ideas?? The mobo came with a heatsink already attached to the via kt333, but i remember reading somewhere, in a review or something, that it doesn't come with any compound. Should I try that?? What's up???

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Maybe you don't have good contact between the hsf and cpu. How many lugs does the hsf clip use? Is it the kind where you use a screwdriver to push the clip into place? Are you sure the clip is attached to both sides of the socket?

jaybee
 
I checked the hsf and it seems to be connected securely. It's the kind you push down and secure over the center lug. I think what may be happening is that the via kt333 chipset is covered by a hs only that was installed by the mobo manufacturer. I don't think they used any thermal compound in between however. Maybe just a thermal pad. I'm trying to get in contact with them to see what they say.
 
Are you sure you have the cpu hsf on the right direction? Some can be mounted successfully in reverse -- but they're not flush with the cpu.

jaybee
 
Did you check and see if the fan for the Heat Sink is plugged in? Also, is it plugged into the correct header on the MB that was designated for this? If you are going to reinstall the HSF (a good idea), then you will need to make sure you have some thermal compound to do so. You will also have to (more than likely) remove the old compound from the HS. It will either have some sort of thermal grease of a thermal pad on it. The thermal pad must be removed completely as it is not reusable. In order to do so you will have to first gently scrape off the bulk of the pad with something like an old credit card or other plastic that will not scratch the HS. Then remove the rest with either Nail polish remover or Isopropyl Alcohol. If you use the Nail Polish remover it is still recommended that you use the alcohol to complete a good removal of all residue of the pad and the Nail Polish remover. Huh? Anyway, you will then have to reinstall the HS using some thermal grease such as Arctic Silver. You can find instructions for doing this on this page.
 
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