ccc ?

The catalyst control center?

try afterburner, Rivatuner (extend the limits in power user), AMD gpu tool maybe?

This works in 1.4 not sure about 1.5

To unlock unoffical clocks in the Programsfiles/msi afterburner/msiafterburner.cfg
Open with note pad, scroll to the bottom and change unofficial clocks to 1 and it works

Idk if it works with the 4850 but with the 5870 this works.

1. Open Afterburner and set max clocks.
2. Close Afterburner. dont just minimize it, X it out.
3. reopen Afterburner and the sky is the limit.

^indeed a very handy trick

I forgot to mention that you still have to change the cfg file using notepad first like Witchy said.

Yup or BIOS mod it, you can set max voltage that way also.

GPUz to pull BIOS RBE to edit it, and i just used atiwinflash to put it back.