I am having a problem with farcry 3 where the sky flickers nonstop. I have tried all the detail levels but the flickering persits. Other 3d games and 3d marks work fine (sky rim battlefield 3 call of duty black ops) so i know the graphic card is fine. I have tried most of the older video drivers with no luck. I have also reloaded windows.

amd fx 8150
evga 650 gtx sc
win 8 64 bit
8 gigs of ram