Panning Micro Stutter

In VC (using trackir), I get a microstutter when I turn very fast. I assume this happpens whilst textures load, and is unavoidable. THe concern is thatit happens if I turn my head shortyl therafter (I assume because what has to be drawn has changes). My questions is: which parameters can be adjusted to minimize this? AGP Aperature, Page File latecny?Thanks