Sometimes when running through town random geometry and flickering textures appear, in front of the scene.

Sometimes ground textures will flicker on and off as well.

Alt-tabbing from the game and alt-tabbing back in fixes the issue temporarily.

Restarting the game fixes the issue for a long time.

Might be an issue with SLI.

Specs:

2x GTX 560 Ti OC SLI (Arma3 profile)
i7 2600K 3.8 GHz quad core
800 MHz CAS 8 RAM (20 GB)
High settings, 1920x1200 resolution