problem with lockups

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I put together a P4 w Intel mb D845EPIL. CD Rom only peripheral, 512mb ram. Win XP pro

It ran fine for a couple of months, then started locking up frequently. Thought it might be a virus, but have ruled that out. Even installed a new hd. Same thing. Figured it must be the mobo, so I bought a new one, same model. Swapped the ram out for one that was running fine. Replaced the ide cables, just for the heck of it. Problem persists. Re-installed xp on the new drive and it runs through the whole install successfully, but hangs on final reboot. I can then turn power off and restart and Windows runs

Thought it might be overheating, but nothing seems hot, all fans operational. When I installed new mobo I removed old heatsink and reapplied new. The only additional card is the AGP 64 mb. Could it be the offender? How bout the power supply? It's not hot and the fan is running. Everything has power. Could it be the CPU
Also, device manager shows the yellow "?" on Other devices under which is ethernet controller and a couple other items. But they are built in to mobo, and get this same status on both mobos. Highly unlikely that the new board is defective in exactly the same way as original. No
Any advice will be appreciated
Brya
 
-----Original Message-----
I put together a P4 w Intel mb D845EPIL. CD Rom only
peripheral, 512mb ram. Win XP pro.

I too put together a computer but with an AMD chipset. My
computer used to hang when the graphics card got too hot.
But that was a sapphire 9600 128MB that didn't have a
fan, just a heat-sink. The computer is a normal upright
system which means the graphics card heat-sink fins point
downwards. Everbody knows that heat rises, the heat
wasn't being dissipated because it was being caught in
the spaces between the heatsink fins. So I inserted a
Vantech pci fan that has two fans that blow directly onto
the graphics card. I also opened up the case and my
system now runs very cool and no longer hangs, crashes or
reboots itself. Your problem is all the more annoying in
that it worked fine for a few months. If it isn't port
conflicts it might be the graphics card getting too hot,
just because it hasn't got a fan doesn't mean that it
doesn't need one. If you graphics card has a heat-sink
touch it the next time your computer hangs to see if it
is hot. But be carfull not to touch any chip pins incase
of electrostatic discharge which will fry your your
chips
 
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