Hi, I recently bought an ASUS GTX970 to replace my R9 270. Every time I play a game now, I can play for about 15 mins then my PC restarts and I get a mesage saying Asus Anti Surge has shutdown the PC because of unstable power supply unit. I never had this problem with the R9. Also the light on the power switch for the PSU is blinking green. I've tried connecting my PC directly to the wall socket instead of using my surge protector. Do I need to shell out for a new PSU or is there another problem? My current specs are: intel i7-4970k over clocked to 4.4Ghz, ASUS H81-Plus Mobo, ASUS GTX970, 16GB Kingston RAM, I think but can't fully remember without taking the PSU out of the chassis, that its a 750W, I know the manufacturer is Powercool. Which PSU would you recommend, I was looking at a be quiet Pure Power L8 80 Bronze 700w. Any ideas/help will be appreciated.