When I installed the official HD textures pack, my rig did the opposite. My fps has improved with decreased lag in 1080p resolution. It runs better than before, even better than when I first installed the game! i7 950 @ 3.07 GHz, 12 GB RAM, 7200 RPM HDD, and Radeon HD 6770. Is the performance hike due to the RAM, CPU, or uninstalling the previous HD mods? This is a true fact and NOT trolling. UNDER NO CIRCUMSTANCES WHATSOEVER SHOULD THIS POST BE DELETED!!!!!!!!!!!!!!!! :mad: