Is it happening in other games as well? Could actually just be a driver issue. Run 3D mark or something and see if it continues.
And no, this can't have anything to do with RAM. The gaming series of RAM only matters when you are pumping 2.1 v into the RAM and overclocking etc. The regular Kingston memory is excellent. The gaming RAM is a bit overhyped if you plan to run your hardware as it is meant to.
edit:
If it is happening in every other game, then go to the video card settings and try messing with the settings. I am not talking about anti aliasing or anisotropic filtering, but the other little stuff. Some of it can cause weird issues at times.