NEW Alienware X51 R1 R2 R3 CPU Heatsink with Cooler Fan 07C20C 0KN1NP 0WKGR1 894586237550 | eBay
X51 R2, heatsink upgrade and shroud mod - Dell Community
X51-R2 CPU Cooler replacement - Dell Community
Dell Alienware X51 R2 Desktop Series CPU Fan with Heatsink 7C20C WKGR1 Used - Walmart.com
CPU cooler replacement and shroud mod on X51 R2 : r/Alienware
Alienware x51 r3 CPU Fan Replacement - iFixit Repair Guide
X51 R2 CPU Cooler Upgrade and GTX 970 Success - 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
CPU cooler replacement and shroud mod on X51 R2 : r/Alienware
X51 R2 CPU Cooler Upgrade and GTX 970 Success - Dell Community
CPU Fan Compatible with Dell Alienware X51 R2 7C20C 0.75A 0.6A US Stock | eBay
Alienware X51 R2 Desktop CPU Cooling Fan F718G | eBay