This is a genuine Dell replacement fan for your Dell Optiplex 990 Small Form Factor SFF PC. If your fan is making noise or has stopped all together you can install this replacement in minutes.
Replaces Dell Part Number K650T, WDDHR. Compatible with Dell Optiplex 780, 790, 990 and 9010 Ultra Small Form Factor PC's.
This Case Fan is used and has been tested for proper functionality.