@Assimilator1 you're running W7, right? What does the event manager say after a reboot?
Good point, I'll check. I can't find an event manager, but I did find an event viewer, is that what you meant?
Critical - Event ID 41 kernal-power - The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
After rebooting their is a small window open saying windows has encountered an error. Not much help there.
Could it be due to amperage spikes through the GPU, which are taxing the PSU too much? Do you know whether your PSU has a single 12 V rail, or several?
On the other hand, it could be purely a software problem (a crash of a kernel-level driver).
I can't remember the number of rails it has, I'll check later, along with getting my DMM out to check the 12v rail readings. I do remember it's an old Corsair 650w PSU, more info later....[update] It's a
Corsair TX650w, it's got a single 12v rail. Apparently it's MBTF is ~11.4 yrs, I wonder when I got it? I think maybe I got it for when I 1st built my C2 rig(2007)! lol, although it might have been a bit later.
DMM readings from my PSU whilst running SETI on CPU (10 threads) & GPU :-
12v line - wire1 11.95v, wire 2 11.96v, wire 3 11.97v (small plug to mbrd), also seen at the main ATX plug (different WU maybe?) And a steady 12v (11.97-12.03v) to the GPU plug, I watched it on & off over several minutes whilst also looking at GPU-Z to see GPU load.
5v line - 4.86v (main ATX plug), 3v line - 3.32v (main ATX plug).
That good ole PSU is chugging along nicely
I wonder if it's some sort of problem relating to when the monitors go to sleep.....