I have a new Powercolor 4670 AGP card and try to overclock with ATT 1.7.91532 ATT shows BIOS GPU 750 and BIOS MEM 667 but current GPU 2775 and current MEM 1600. These are also the max values of the sliders. If I try to change mem and/or gpu speed and click apply it is reset to 2775/1600. If I set mem speed to 680 and click 'find max for mem' it is running a short test at 680 but instead of increasing the rate a just bit it jumps to 1600 on the next run and fails. CCC does not show overdrive options at all. Is this card not ready to be overclocked ?