Nvidia 980 Ti freshly installed, working but does not recognise GPU

Hi all,
just a little help needed here I think.
I changed from 680ti to 980 ti in order to work on GPU based programs like Davinci Resolve and Adobe suite.
All connected, working, in the sense that the OS fires good, but when I open Davinci it says no GPU installed.
The latest drivers are up to date.
I'm running Yosemite 10.10.1.
Anybody have any suggestions?
Thanks in advance.
Alex.