Originally Posted by JonNik
Mine i.e (I ended up setting even more extreme values increasing my mins and pushing medium and large values further) are more of a brute force approach and bring the framerate quite a bit (30 fps min) down on a core i7960 ATI 5870 (somewhat better than yours)… I just can't stand NPCs i.e popping into existanse a few "meters" away
(I also double the Roi value on G3 usually )

I think some of your issues are ATI related. I played with the default high settings, and the only pop-in I ever saw was some minor world objects and foliage at a distance. I never saw an NPC pop in during my entire playthough.