i have a gigabyte gt 630 2gb card ddr3 version. When i play games with a high end graphics such as medal of honor warfighter,nfs most wanted 2012 my pc restarts automaticly. It happens when there are visuals of explosions or some transparent contents. My hardware configuration is listed below-
intel core i3 540 3.07 ghz processor,
intel dh55pj mainboard,
nvidia gt 630 2gb ddr3 pci ex card,
6 gb of ddr3 ram,
samsung 500 gb hdd,
my psu is mercury 400 watts and it has 22 amps in 12volt rail. What's the problem that causes restarts? Is that the psu or the gpu?