If memory serves, the magic number for the "pixel culling while moving" setting is 2.
For understanding, the pixel culling setting is a way to reduce the level of detail displayed. It's become a very useful tool for me, when I have to deal with very large assemblies. I have to set it to 10 or higher in order to be able to do much of anything.
Same behavior with the level of detail settings: larger number means more coarse, smaller number means more fine. Hope that helps with the general understanding!
Cheers