CPU Fan Compatible with Dell Alienware X51 R2 7C20C 0.75A 0.6A US Stock | eBay
X51-R2 CPU Cooler replacement - Dell Community
Old & New (Bring Alienware X51 R2 back to life) by meng8123 - Intel Core i7-4770, GeForce GTX 970, EVGA Hadron Mini ITX Tower w/500 W Power Supply - PCPartPicker
X51 R2, heatsink upgrade and shroud mod - Dell Community
CPU Fan 7C20C 0.75A & Heatsink WKGR1 Compatible with Dell Alienware X51 R2
Alienware X51 R2/R3 CPU Replacement - iFixit Repair Guide
Cooling Fan For DELL ALIENWARE X51 R2 R3 7C20C -A01 07C20C 12V 0.75A 4PIN | eBay
X51 R2 CPU Cooler Upgrade and GTX 970 Success - Dell Community
NEW Alienware X51 R1 R2 R3 CPU Heatsink with Cooler Fan 07C20C 0KN1NP 0WKGR1 894586237550 | eBay