I read in some post here about something which i dont quite remember but it said that when the card uses its transistors it gets hotter and it mentioned AA and HDR. I recently added another fan to my computer and my 8600GT reaches nearly 75C (Instead of nearly 90) under load so i wanted to know which special effect makes the card hotter? Anti Aliasing or HDR? Frankly i can live without out AA but HDR really adds to the game (Oblivion). I cant even imagine how hot my GPU will get in a DX10 game.