Hi techies.
Could use some help here.
My PC reboots every 2-3 hours or so when I'm gaming (relatively low-end games like Fallout 3 and farming sim) and sometimes even when I'm watching simple YouTube vids. Temperatures were completely normal even when running high-end games like Far Cry 4 maxed out, some 2 months back when this problem apparently didn't exist (neither GPU, CPU or motherboard ever crossed 70C on Speccy). I also ran Windows Mem Diagnostic since I recently removed a Kingston 2 GB RAM stick to fit into another PC but it found no errors. Also updated all my drivers except BIOS, with no results. My PC still 'cold reboots' every few hours. Only thing I haven't checked is the PSU because apparently it's a bit complicated. Scoured the whole internet for answers, but couldn't find any.
My specs:
OS: Windows 8.1 Ultimate
Power: Corsair VS650 - 650W PSU
CPU: Intel i5 - 3570 @ 3.4 Ghz
GPU: 3072MB PowerColor ATI AMD R9 200 series (Radeon R9 280X OC)
M'board: Intel - DZ75ML-45K
Storage: 117GB SanDisk SDSSDP128G (SSD) (Primary boot drive)
931 GB Western Digital WDC SATA HDD and
931 GB Seagate Expansion External SATA HDD
Memory: 2 sticks (4+2GB) 6 GB Single Channel DDR3 @ 666 MHz (9-9-9-24)
Display: Samsung 1920 X 1080 supported HDTV.
P.S. The problem only started a month ago, before which the PC ran just fine. It's a new build and hasn't been OC'ed. Plus I'm a tech noob.
