My ASUS Crossfire X1900XT does not seem to be overclockabel in CCC.....even after 'unlocking' with the little padlock, the core slider shows 621MHz - 621MHz and is therefore unmovable, the RAM slider simply shows the 2D speed at one end and the 3D speed at the other, but again will not move 
Anyone got any thoughts ? This has been the case throught the last 3 versions of CCC (currently on 6.9)

Anyone got any thoughts ? This has been the case throught the last 3 versions of CCC (currently on 6.9)

) therefore a fix....