Unlocking a HD5870 for OC'ing

[pallethecop]

Yup, so the clock speeds are restricted to 900mhz core/1300mhz memory, how do I unlock it? And any ideas how far a 5870 can be cranked?
Im more than happy if someone with experience could give me some tips!!




EDIT: Nvm, I found a way, a little google research and lots of miserable hours later I finally got it to work.

 

[87dtna]

Use MSI afterburner.