Not sure about IBM since I've never had to changed one yet but on Dell's, it is user replaceable although you'll learn how to take the entire machine apart and put it back together in the process. Dell's cost $14.95 for the Inpiron 8000/8100/8200, Latitude C800/C810/C810 and the Precision Workstation M50. You can buy the same fan but from Allied Electronics only at more than the price of Dell.