Well, I tried the hard overclock bios and now the light. My HIS 4850 seems to have a limit on the core which is why I dropped to the light clocked bios. I wasn't able to step back down from 750 through CCC with the hard clocked version. I am also running into a problem with drivers. I have tried to install the 8.8 betas that came out and it doesn't recognize that I have a valid ATI card. 8.7's seem to be fine though having also the upper limits as stated for the bios.