Well I'm back on 14.4 with my Asus 290x in win 8.1 64 bit... tried installing 14.9 last night - screen goes black during install - monitor fails to detect a signal - and it never comes back. Press the power button to shutdown, reboot, bios screen shows up fine, but as soon as windows starts to load, black screen then nothing.... Couldn't even get to the F8 repair screen, had to load from a windows 8 disk get to a command prompt and do a: "bcdedit /set {bootimg} displaybootmenu" yes so that I could get into safe mode... then had to do a system restore in safe mode to get back to a working machine!
Tried several times - even reinstalled windows with nothing else on to try and get these drivers to work - but no luck!
Yeah i got a blackscreen on windows 8.1 had to hard boot but seemed to install ok, that was on an MSI Gameing 290x