Just got it this week and have had some problems playing with some of the hacks. Had trouble with unlocking the shaders but sorted it out with driver reinstall. Tried the CCC registry hack and finally got that working. The problem is this card locks up in games if I set it over 810. Doesn't seem to matter with shaders locked or unlocked. Went back to everything default and 815 locks up. Using 11.3 CCC, temps are good for stock cooler,low to mid 60's load and even tried Afterburn. You guys have any ideas or did I just get unlucky and have the only 6950 that tops out at a 10 Mhz OC.