Every time i go to run a game for example BF3 and Skyrim my computer just crashes and my screen goes black and my monitor goes on standby but the computer is still running, and i cannot do anything apart from a manual reboot. Minecraft runs for about 5 seconds and then the same thing happens also, i downloaded the "OCCT" testing program, and when i test my CPU it is fine, when i test my GPU my computer just crashes and screen goes black and then also when i test my power supply the same thing happens and my pc just crashes and the screen goes black. I was running all of my games forever before today and have had no problems what so ever, yesterday i was running bf3 in ultra and recording at the same time and everything thing was perfect, just today this has randomly started happening, i will put the stats of my pc below:
CPU - AMD FX 8150 Eight-core 3.6ghz
Graphics Card - Gigabyte GTX 560Ti
RAM - 16gb @ 1600mhz
PSU - 700w
Hard Drive - 2000gb (2tb)
Additional Details
My computer is new, i built it about 2 weeks ago, all parts are new and i have a 700w PSU! Ive been playing games on it for over a week, all fine up till today! Im pretty sure everything is installed correctly and all drivers are fine because it was working yesterday and for weeks. Ive checked inside and all seems good, also tried updating drivers but all up to date! Im really puzzeled as to how to fix this!
Can anyone please help me? Any advice and help would be much appreciated!
Thanks.