Random System Shutdowns.....

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I just gave a quick glance at the posts....

I see mention of a 3200+(most likely 130nm) being cooler...it better be it's a newer core...we are talking about a 1700+(180nm based on the vcore) here. Same as the way that my friends Athlon64(939 .92nm) runs a good 10c cooler than mine(754 130nm)

Your temps are around normal if thats at load. Those suckers run hot.....Hell a friend of mine had a XP1800 model 6 and i had the model 8. guess what over 20c cooler. Die shrinks kick ass...

I am not about to rule out heat.

Did you try to run it with the side off?
In some cases the old Athlon XP's would generate enough heat that the heatsinks air would warm up the north bridge cooler to the point of overheating....causing issues similar to yours.....

I suggest you clean it up as best you can with compressed air(in a can....even tho i use an air compressor...i cant recommend it)

Make sure all fans a clean. carefully unscrew then and clean the blades with q-tips and rubbing alcohol(this stuff is good for everything)

Run the case open. and load er up.... see if it's better.....if it last longer than normal. it's most likely heat. Touch the north bridge cooler to see how hot it is.....if it's hot you can try to mount a 40mm fan on it with zip ties(around the ears it mounts with)... see if that helps...

Still happening?
Scan for spyware and viruses.
Google for
Ad-aware se - To look for spyware (please note it also bitches about browser cookies...those can be ignored)
Trend micro housecall - Scans for virus's and spyware

Still no go?
Try to leave it in the bios and see if it shuts down...if not maybe it's a windows glitch....they exist

Sorry...i am out of idea's now

Hope something helps...
 
Turn off Power Down at CPU Temp: 67 C in your BIOS and all SysTray applications.

Having an alarm for 75 C on an Athlon XP makes sense, but power down is pointless especially if it fluxuates and goes over 67 C even for one interval