I'm getting this awful texture/geometry clipping in Fallout: New Vegas, although the game runs perfectly at constant 60FPS with everything maxed. I tried with and without mods, with the latest drivers, after a clean install and after tweaking the game, with and without de D3D9.dll hotfix... Nothing, I always get that clipping.
Intel Core2Duo E7400 3.2GHz (OC)
NVIDIA GeForce 9800GT 700/1750/1000MHz (OC), 260.99 drivers
4GB Kingston RAM 800MHz
Windows 7 Home Premium x64