PC Crashing During Gaming - PSU problem?

AbsoluteToast

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Jul 27, 2015
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Hi, I'm having a crashing problem with my PC that I built (first time building one), in March this year. At first when I ran a game the video driver would crash after about 15 minutes ( the game would just close and OS would still run fine). I updated the driver with a clean install, then games still crashed after the same amount of time but the whole system would crash and force me to hard reset. Since then I've reinstalled chipset drivers, checked both RAM sticks, cleared the GPU fan of any dust or blockages, checked temps of everything which are fine, even just removed GPU and reseated it. Still having the problem, and from other threads I've read the only other cause I've yet to rule out is a power problem. Using CPUID HW Monitor my +3.3V rail seems fine at 3.312V. The +5.5V is at 2.985V and the +12V is fluctating between 13.3V and 13.9V, (these figures are when PC is idle).

Any help would be greatly appreciated I can't play games :(

Specs:

PSU = EVGA 500B 500W 80+ BRONZE
MOBO = MSI 970A-G43 AMD 970 ATX
CPU = AMD FX4300
RAM = 2 X HyperX FURY Series 4GB DDR3 1866MHz CL10 DIMM
GPU = EVGA NVIDIA GTX 750Ti SC