Amazon.com: G.Skill Trident Z Royal Series 64GB (2 x 32GB) 288-Pin SDRAM (PC4-28800) DDR4 3600 CL18-22-22-42 1.35V Dual Channel Desktop Memory Model F4-3600C18D-64GTRS : Electronics
Micron 64GB DDR4-2400 4RX4 ECC LRDIMM MTA72ASS8G72LZ-2G3B2 at Amazon.com
Samsung M386A8K40BM1-CPB 64GB DDR4-2133 4Rx4 LP ECC LRDIMM Server Memory at Amazon.com