Bug display a little disturbing

Whenever I play a game recently, I have several bug display and after some minutes it lacks pixel and the game ended up planting, I close the PC and I must leave for 10 minutes before restarting . The games are so I speak: Call of Duty 2 and 4, NFS: Most Wanted, Oblivion, Dark Messiah Might and Magic, Lord of the Rings - The Battle for Middle Earth 2. There's also Fable-the lost chapter, but there is a possibility to start in Safe mode, as it's working very well. In fact the only games that I can play are: Counter Strike 1.6 and Warcraft 3 and fable. Someone has a solution?

can you give us more details about your configuration ( video card, mobo, processor etc ) ?

Graphics card heating problem .

Leadtek 7600GT, my graphics card was last night little overheat !
A solution for cool?