so i have ati 7750 1 gb ddr5 oc edition and all was fine since few days ago , some strange flickering started at my monitor and games started to work really really bad ,, fps droped about 25-30 fps ,, so i updated my drivers and all was fine again until i restart my pc ,, all goes wrong again , same stuff , monitor flickers and games run baaad ,, pls help i dont know what to do