Hewlett Packard Enterprise HPE SmartMemory 64GB DDR4 SDRAM Memory Module - for Server - 64 GB (1 x 64 GB) - DDR4-2933/PC4-2346 at Amazon.com
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G.SKILL Ripjaws V 64GB DDR4 SDRAM Memory Module at Amazon.com
G.Skill Trident Z Series 64GB (2 x 32GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-64GTZR at Amazon.com