My computer keep restarting itself before launching to the bios. I have 4 Kingston 4gb ram, my motherboard is Gigabyte GA-Z68P-DS3 Rev2.1. I have try reseat my ram and it fix the problem when I play star wars battlefront. About 5-10mins, my game freeze and monitor turn black and I try restart the computer. Its boot normally but the screen is black. So i tried reseat the ram again. computer restart again as usual.