Im playing low fps as usual then I have some weird screen thing where it goes blue black and green and squares I don't know I then have to press ctrl + alt +delete to get out of it and play planetside 2 and go wtf. Earlier somewhere it was like my whole computer crashed .
Your GPU is probably overheating. What is its temperature under gaming load? Use EVGA Precision X or MSI Afterburner to get a reading via a game overlay.