This is an unofficial 12.6 beta driver 8.98 branch, not a MAIN branch (and latest on wich they develop caps [latest would be 8.99]) like previous leaks.
So don't install caps depsite the dll version they are very older and don't have latest profiles for example max payne 3 cfx and and diablo 3 cfx.Install 12.6 cap1 instead.
Windows 8/7 and Vista supported. Cards supported HD5000 and onwards.
We havea discussion thread open on these driver right here.