Sorry if this question has already been answered. I've just got myself a new system(spec below), Been playing this game no problem yesterday. Come to play the game on the Le Mans 24Hr race. Get a few hour (mins) into the race and this start to get real stuttery. I think it's a known problem but is there a fix?
Coolermaster RC-1000 Cosmos/1000W Corsair HX Series
ASUS P6T Deluxe - Intel i7 920 @ 3600Mhz.
Sapphire HD 6990 4gb
6GB (3x2GB) Corsair Dominator DDR3, PC3-12800 (1600) CAS 8-8-8-24
500 GB Samsung Spinpoint F1/30GB solid state OCZ Core Series V2 SSD
Windows 7 home Premium 64
Xbox 360 : panny 42" 1080p plasma : Denon 5.1 DHT-1356XP