Bad fps Drops until Alt and TAB out then in happening in all games

leyton1

Honorable
Dec 6, 2013
101
0
10,680
Ive had this problem before with my old GTX 650 and it just fixed itself but this is really annoying ill be running for example GTA V at 60FPS locked for about 10 min then it suddenly drops too 7-9 FPS i can fix it by minimizing the going back full screen but then it does it again it wasnt doing this yesterday and ive changed nothing

Im using and I5 4690k, r9 280 3gb dual-x Asus z97 Pro Gamer, Vengeance 1600mhz 8GB , running game from ssd sandisk extreme 120gb

need any more info just ask

Thanks in advance