So this is something that has only become apparent recently. Though I'm not sure if it's the latest Nvidia driver, the dayz mod (e.g. changing HDR to very high to see in dark), or just being in a specific aera in Cherno.
It is most obvious when I look in a specific direction, usually south. I know artifacting is generally temp related, but my temps are fine.
http://i48.tinypic.com/2u6ntpu.jpg (108 kB)
http://i45.tinypic.com/2eksln7.jpg (108 kB)
http://i45.tinypic.com/20sepn5.jpg (106 kB)