does anybody know ??

[bushwickbill]

I have been working very hard at getting my shader clock to get over 1512 while at a 648 core. With the new Rivatuner you can modify the shader clock ratio to change your shader clock. So, While at 648 core I have entered numerous shader clock ratios(2.3,2.42,2.58,2.65) and It will not go any higher. I know my shader clock can go higher, when I bump the core to 675 the shader goes to 1566. But i would like to play on the safe side and keep my core at 648. I have seen numerous people using this new shader clock ratio to get their shader clocks up in the 1700 while keeping their core at 648. So why is it not working with me?? Has anybody on this site had success at what i am trying to do and willing to help me out. I know this is not going to get me another 20 FPS in Crysis or anything, but it all adds up.

[jdrom17]

I run my 8800GTS 320MB SC at 675/1030 with no problems. Fan at 75%. Are you using a compatible driver with RivaTuner?