Computer has started rebooting

[JonJ678]

e8400/ocz ram/asus matx board. What's strange is that it doesn't reboot under load, but while almost idle (partway through a film generally). I've put everything back to stock (hit reset to defaults in the bios).

Sometimes runs for ages, sometimes goes down after 10 minutes.

I think the processor is dying on me. Can't rma it since I lapped it. How do I check this?

Cheers

 

[JonJ678]

Nope, doesn't freeze. Reboots, loads operating system and proceeds as before. Does this under windows and under ubuntu. No signs of blue screens, the computer just powers off then starts up again.

 

[JonJ678]

e8400/ocz ram/asus matx board.

My bad, I'd have thought the opening line was sufficient for system specs in this case. 2x2gb 800mhz ocz gold "vista series" and the P5E-VM motherboard.
The power supply is the "Hiper 630W HPU-4M630", now I know hiper get some abuse but this was a well researched choice that has comprehensively outlived my ocz elitexstream. As it isn't even running a graphics card at the moment I'd be astonished if the system is rebooting from lack of power.

Case is a reasonably nasty gigabyte model bought because the missus thought it looked pretty. Cpu isn't overheating, unless 65 under load counts. It cant be over 40 degrees when it reboots.

Highest vcore I've offered the processor was 1.45V for an hour or so. This is over the intel recommended, but as I'd lapped it anyway losing warranty didn't worry me too much. Bit thrown by the system crashing while idle at stock speeds. Anything else to check? Trying a different cpu is a lot of effort, whether sat on my arse or otherwise.

 

[JonJ678]

If it was static damage, Id be surprised for it to run fine for months then suddenly throw a strop. Equally, I'm not sure voltage damage from years ago would do that either. You may be onto something with the psu, I've got a 860W PC power&cooling which I very much doubt is faulty in my other computer. I think I'll try that before changing processors around. Got to be easier to try a different one than hooking it up to an oscilloscope/data logger pair.

The case is nasty, as is cooling, but as the overclock was minor and is now zero, and temps are fine, I doubt changing case is going to help. Interesting that you think the cpu might be alright. I took no antistatic precautions while lapping whatsoever, beyond the obvious of not wearing jumpers etc. I'm doubtful that this is the problem, as it was lapped carefully with the plastic cover protecting the contacts. Dead psu would be generally good news, its cheaper than an e8400.

I wont be doing anything with this for a couple of days, as watercooling the prettier computer (with the better psu) takes precendance for a bit, but I'll report back in a few days. Cheers