I second this. For me WoW framerates generally are around 15 fps when running around outside. Indoors in cities like Ironforge, it can go up to 30 fps. However in some cities with a lot of activity, it can drop to about 8 fps. Finally, the one time I tried to go into a dungeon with a large party (5 or 6 players and lots of monsters, it was just too much). I didn't have the framerate display on, but it must've been something like 5 fps or less because it was really jerky. If you're doing a dungeon or raid I would set setting slow (especially spell effects, horizon, etc.) and see if you get better framerates.