I know that, I used Rivatuner mostly for the fan speed reducing, but then I bought a zalman vf700 cu and noise disappeared. Now I´m just using coolbits for 6 months or so. The gfx card is running at 580-1100, but I never saw artifacts, so I think I could raise memory speed even more, but in rivatuner and in coolbits it won´t pass the test. So I´m stuck with these speeds. Thanks anyway guys.