your gpu is probably fine, set all back to defaults, roll back drivers etc. as an experiment, (i have an old x1950 pro 256mb) I set my fan throttle points to hit 100% at 50*C. I have been playing on medium settings with all anti analysing turned off (game and CCC) including FXAA for 3 hours cpu temp: steady 31*C mb temp: steady 26*C gpu temp: 60*C - 63*C all CCC settings either off or app defined, A.I off now, this doesn't look amazing, but it is playable and with you lot having big chunky hd range you should be able to play on higher settings but with the AAoff etc. (no idea about nvidia cards srry)