Heaven is crashing, even after resenting my GPU to default? GTX970

[Amberr]

So I was doing some overclocking on my Gigabyte 970. At a core clock of 150 and a mem or 250 everything was fine. It was ruining in the high 60's. So I gave the fans some more power and upped the core clock to 170 and the mem to 280. After that I launched Heaven again and everything was going well. Seeing that is seemed to be fine I started a benchmark, the software quickly started to flicker to black and then it crashed. In reply to that I lower brought back the OC some and tried again. That time it started to flicker at startup and crashed before it even got to the loading screen. In reply to that I bring back the OC to the 150/250 it ran fine at for over an hour. Same thing, flickers and crashes before it even gets out of the loading screen. So In reply to that I completely reset all of it. Tried to launch it and got the same thing again. Anyone know what is going on?

 

[Alan Caldwell]

Try this,
First of all you need to TOTALLY remove all the old drivers. Use this link.
http://www.wagnardmobile.com/DDU/
Note:
Select the respective company(i.e Nvidia or ATI) drivers to be uninstalled.
Use clean and restart option.
And then install the new drivers after rebooting.