Hi well here we go again. I know a few people plus myself on the 12.6 and sniper elite v 2 plays like a dream. So do all other games of course I am not loading 20 programs at boot and my pc is setup to perform. also many other people do not experiance this problem. The pc I have the one 7870 in is older like a q9650 8 gig ddr3 1600 mhz ram, has not been a bios update for the board in 2 years. So I think in this case one must have there pc setup properly to have a good gaming experiance. My other pc has 2 7950 cards it performs very well also on the 12.6 although much newer board . So I suggest look for other problems like do you use a green hard drive is the pc setup properly test your ram and hard drive for errors for ram use memtest for the hard drive use hd tune. And yes I having been doing this since 1990. Check the temps. If your hard drive cant keep up with the video it will cause problems try a raptor drive or somthing that is above the cheap models. So as you can see there are many people having no problems with the drivers its time to look elsewhere. Next time please post your pc specs that way it gives us a chance to look for problems.
MSI Mpower Max, I7-4770K, MSI GTX 780 Lightning, G.SKILL Trident X Series 16GB DDR3-2400, 2X Kingston HyperX 3K 480GB , 1Tb Raptor, Creative ZXR Sound, 1000 watt Coolermaster Single 80 amp Rail, G700s Mouse, Z5500 Speakers