I notice this in the 1.6.9 exe with aw2 and my older nvidia card, i assume your not using aw2 and the 1.7.x standard exe, if so might be worth checking you have the latest drives (NOT FROM MICROCRAP) and if that has no luck with that try turning of AA support in the game (personaly at 1080p i prefer it off in jo), frame effects and set to bilinear instead of trilinear, as this may help things.
Also how is your screen connected, had a system today over dvi it had no ferrite beads on the dvi cable (same would likely apply to hdmi or display port), the monitor had an external power supply which was close to the back of the pc and there was some strange crap happening, moved power supply for one of the screens and swapped out the dvi cable and shazm perfect picture.
If your unsure on what device driver to get drop me the device id for the device and the windows version and i will find you the latest driver.