Is this a custom built machine?
I would look into CPU overheating as the very likely issue, especially during CPU intensive work...
Get yourself a copy of
Realtemp and watch it while rendering.
If that's the problem, you'll probably need to check the CPU fan first, if that's working, dust off everything else, and possibly remove the fan, CPU, clean the top and re-apply some thermal paste (Arctic silver is what we use)
Next would be the GPU and RAM, but much less likely.
And then there's always those guys at the Geek Squad :-)
Vince Becquiot
Kaptis Studios
San Francisco - Bay Area
