Why does my computer shut off on my and then goes to the power light blinking when im gaming with a 650 watt psu from kingwin ...... currently have a fx 6300 with a 760gm motherboard (not the best) 8 gb of ram 1tb hdd optical drive 650 watt abt kingwin psu like 5 fans and the r9 280x... also i checked my motherboard and it doesnt seem to be overheating and i dont think its the motherboard...... is something wrong.... idk...... confused forever