sometimes i feel like an idiot. How the hell can the same card run 10 degree cooler with 250 MHz faster GPU speed ?
Well to be honest, my machine runs with no case and I have pretty good airflow in the room.
Its like this: [window] ... [computer] ... [window] (with like 5 meters from window to window.
The windows are slightly open so airflow is given.
Also the card is freshly bought. Therefore there is no dust on it.
I strongly recommend cleaning up your card. On a friends card I won 14°C by just cleaning it.
Bye the way: I had to go down to 945 Mhz cause it freezed after some hours.