Ok so I installed the 7970 today and everything was running smoothly. No problems at all.
I correctly uninstalled previous driver versions before installing and installed correct latest version for this card.
I even ran Unigine Heaven Benchmark and got a good score and no problems to report.
However i decided to test out Far Cry 3 on this new card. 15 minutes into the game the screen randomly goes black and a few seconds later my monitor reports 'no signal'.
After rebooting the PC everything is fine. So i decided to try Far Cry 3 again to see if this was a one off event. This time 2 minutes in it happens again only this time my PC restarts.
My power Supply is 650 what Gold rated which is more than enough so its not a problem there. The cables are all connected securely and the card is seated firmly into the PCIe x16 slot.
The first crash was on the AMD 13.2 Beta driver. So i thought maybe unstable and rolled back to the 13.1 driver but that was shortly before the second crash.
Any ideas?