I recently upgraded my GPU from a 260 GTX Core 216 to a 560ti, and I put my old GPU into my brother's PC, which was running integrated AMD graphics.
As soon as I installed the card, my brother's PC has been plagued by crashes anytime he tries to stress the GPU.
To troubleshoot, I performed a clean install of Windows 7 Home Premium x64 (his OS before that was Vista Ulitimate x64), installed the latest graphics drivers for his card from the EVGA website, and attempted to run CINEBENCH 11.5 64-bit to stress test the GPU; however, the computer crashed and rebooted before the rendering test started (THERE WAS NO BSOD -- the monitor went into "power-saving mode" and the next screen to appear was POST). As of now, I am fairly sure that this is an issue with the power supply, but I want to know what any of you think it might be.
For reference, here is a link to the benchmark I was using, as well as my brother's current setup:
-_- no the volts during use not the input switch. Flip it and try it will only burn out the unit. The volts on the rails, like 12v to be more precise. Speedfan works or you can looks in the bios under pc health ect.