So i have a HD 5770 and i like to play some pretty decent games. But then i try and play Team Fortress 2. I have my native resolution set at 1080p. I try down scaling, but it does nothing. What will happen is my gpu fan will get to more than 3000RPM and it will crush out any other noise. Help???? (Tried overclocking, the best i can get without screwing up my pc is 900Mhz gpu clock and 1300Mhz for memory clock)