Neither one is difficult to change. The cpu fan is just screwed into the heatsink...you don't even need to remove the heatsink to replace the fan. The case fan is pretty much the same...just swapping out and pretty easy to do as long as they are the same size fans.

Formerly known as Sneaku I MISS MY BABY!!! '00 Blk CSVT #1087/2150 built 12/23/99