Powering Down

[EricCamper]

This isnt really a vray problem....I cant render anything that takes over a couple of hours it seems. I crash, burn, you name it.... If I try and render a file over night or over the weekend.....When I come in the next day, my computer is off. No blue screen....Just off. I have ran the memory test and everything was fine, so I am at a loss. Could I have a bad power supply, motherboard, etc..etc..

Stange happenings

[Candelero]

This is definitely a hardware problem...
You may be overheating as the rendering is 100% cpu usage, so
if your MB has some C.O.P (CPU Overheating Protection - ASUS had such one), it may just turn off the PC, when some temperature is reached.

Check out all your vents, powersupply, videocards, etc.

Best regards,
nikki Candelero

[studioDIM]

and/or disable any Protection from the Bios, where possible...

Lele

[Dynedain]

This may sound stupid, but it's possible the cleaning service or coworker is shutting it down (found the cleaning people doing that on mine once).

Or, if there's a power outage/surge (bad wiring, lower voltage at night, etc.)... get a UPS to fix that problem.