CPU Fan Compatible with Dell Alienware X51 R2 7C20C 0.75A 0.6A US Stock | eBay
Alienware X51 R2/R3 CPU Replacement - iFixit Repair Guide
Amazon.com: CPU Fan 7C20C 0.75A & Heatsink WKGR1 Compatible with Dell Alienware X51 R2 : Electronics
Amazon.com: CPU Fan 7C20C 0.75A & Heatsink WKGR1 Compatible with Dell Alienware X51 R2 : Electronics
Alienware X51 CPU cooler replacement Noctua NH-L9I : r/Alienware
Alienware X51 R2 Desktop CPU Cooling Fan F718G | eBay
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
CPU cooler replacement and shroud mod on X51 R2 : r/Alienware
Alienware X51 CPU cooler replacement Noctua NH-L9I : r/Alienware
Amazon.com: PartsCollection Fan Replacement for Dell Desktop 7C20C Intel Fan Alienware X51 : Electronics