CMS 32GB (4X8GB) DDR4 17000 2133MHz Non ECC DIMM Memory Ram Upgrade Compatible with Alienware® X51 R3 - C62 at Amazon.com
Best Buy: Alienware X51 Desktop Intel Core i7 8GB Memory 1TB Hard Drive AX51R2-5722BK
▻ Alienware X51: How to upgrade your PC RAM (Gaming PC Tutorial/ Guide) - YouTube
Alienware X51-R2 Review | PCMag
Dell Alienware X51 Desktop, Intel Core i7-4790, 8 GB memory, 2 TB Hard Drive*FREE UPGRADE TO WINDOWS 10 - Sam's Club
Dell Alienware X51 Desktop, Intel Core i7-4790, 8 GB memory, 2 TB Hard Drive*FREE UPGRADE TO WINDOWS 10 - Sam's Club
8GB Memory Dell Alienware X51 R3 DDR4 RAM Upgrade
X51 R2 CPU Cooler Upgrade and GTX 970 Success - Dell Community
OFFTEK 4GB Replacement Memory RAM Upgrade for Alienware X51 R2 (DDR3-12800 - Non-ECC) Desktop Memory at Amazon.com
Tried to upgrade the memory on new R11. Got the exact spec.. got two boots into Windows verified 32gb..and two boots with four blinking Alienware Yellows which says memory issue. Pulled the