G.Skill Trident Z RGB Series 32GB (2 x 16GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-32GTZR at Amazon.com
Dell 32GB DDR4 SDRAM Memory Module - for Server - 32 GB (1 x 32 GB) - DDR4-3200/PC4-25600 DDR4 SDRAM - 1.20 V - ECC - Registered - 288-pin - DIMM at Amazon.com
Amazon.com: HP 16GB DDR4 SDRAM Memory Module : Electronics