Interesting read here in the last few days.. i will try installing cat 8.8 drivers with a stock bios and then mod it..

@ tigger: you set the clocks in the wrong place. clock info 03 is your 3d clock you have to set..

@ caped crusader: i saw even 250/500 with cat 8.8 at stock bios with an 250/500 setting NOWHERE in the bios. I suspect cat 8.8 has powerplay profiles built into the driver which will be chosen at first install dependent on the card/bios... something like this...