With FULL cache chosen the effects are to have the shortest session times and the largest footprint on the local drive.
With NO cache chosen, the effects are to have the longest session times but the smallest possible footprint on the local drive; it basically retransfers the entire file.
With intellicache selected the effect is to have a middle ground result. Only files above 500kb are cached, and the files which are less than 500 KB are re-transferred again.
Posted in: Technical FAQ's