amd 12. 8 quick quick question

single 6950 2GB (sold 1st) wanting to install CCC 12.8 to hope fix BF3 and Skyrim probs

do I have to UN-install 12.3 1st, and what about the crossfire 12.4 profile CAP its called thing I had installed, I should un-install that for sure (CCC12.3 and 12.4 CAP not to be confused)


But what about the the 12.3, when I install 12.8, will that un-install 12.3 and sort all that out??????????????

I usually just un-install the profiles and install the catalyst's. But seeing that it is 10.3, I would un-install both and update. No driver cleaner/sweep needed either.