I've got an overclocked 2500K @ 4.2GHz and a SAPPHIRE Radeon HD 7950 OC Edition (900MHz stock core clock, 1250MHz memory clock). I did a test in DiRT3 and had about 60FPS average with a low of 58 at max settings. The GPU hit a temp of about 50C. Then I put the core clock up to 1020MHz and the memory clock up to 1500MHz and ran the same test, giving pretty much the exact same results. Why would this occur if I've given the GPU a decent overclock?