Originally Posted by wheth4400
Ram is good, PSU meets the requirements, and the drivers are all the latest from NVIDIA, but then again I am running vista so that could be the issue.
If the ram is good, then it's good. I've never had ram burning out.
By saying the "PSU meets the requirements" what do you mean? Does it keep at least 11.6V on the 12V rail? Anandtech has a very interesting testing methodology for PSUs, you should check it out. They've posted a PSU review today, and what I found very interesting was the PSU diminishes its power output with rising ambient temp. The 5V was particularly affected, but the 12V was affected also, dropping further than usual.
You have a HE, aka silent as far as I remember the branding of Antec's. I wonder if it's not a ventilation problem for the PSU, as nothing locks up randomly. With heat building up in the PSU radiators it decreases the output voltage, which in turns leads to a crash. IMO your PSU works at 80%-90%, it's at the limit anyways, a slight drop in output voltage (with a constant wattage demand from the computer) makes it increase the current, thus the heat (W=V*I if W=constant and V falls, I has to increase). This is a cascade effect that may overheat it and subsequently fail.
Vista is imo a stable OS. I never had a lockup in 2 month of use, I just got fed up with it. nVidia drivers were crap for vista, but they always seemed good enough.
To conclude, I would search signs of overheating components, specially the PSU and the NB/SB.