Well like the linked page says, this kind of error can be caused by a lot of different things.

Could be a bad driver, could be your GPU dying.

Was the card working fine and then the issue starting appearing suddenly?

Did the issue start after a driver update?

Is the issue getting more and more frequent?

Did you try monitoring the temperature of your GPU while you're playing? If so, what is the maximum temperature it reaches?

I'm guessing these are idle temps, because I've got the same GPU idling at about the same temperature.

What really matters are the temperatures under stress, while you're playing.

Just to make sure, when the issue occurs, do you crash to desktop or do you have to reboot your PC?

If it's a crash to desktop, you should be able to find out the max temperatures your CPU and GPU reached with HWMonitor, if that PCWizard thing can't show its information while you're playing.

www.cpuid.com/softwares/hwmonitor.html
You can just grab the zip version, extract and run. Don't bother with the pro version, obviously.

As long as its running, it'll record the current temperature and show the max and min temperatures components reached while HWMonitor was running.

If your GPU goes to 90 or above, that might be the problem. As far as the CPU goes, not sure overheating would cause the GPU drivers to crash, but you never know. Again, temperatures of around 90 or above under stress might be cause to worry. Your CPU idling temperatures are more worrying than your GPU's temperatures.

And since we both have a 970, I'll also mention that I'm still using the old 376.53 drivers and haven't had an issue with those so far.

Yeaaah... my GPU not so much but my Cores go up to 90. Gonna see if I can blast a fan in there and sort it out without having to pay for a service. I'd clean the shit out myself but I'm sure it needs some paste.