G.Skill Trident Z NEO Series 32GB (2 x 16GB) 288-Pin SDRAM DDR4 4000 (PC4-32000) CL18-22-22-42 1.40V Dual Channel Desktop Memory Model F4-4000C18D-32GTZN at Amazon.com
Corsair Vengeance RGB Pro 32GB (2x16GB) DDR4 2933 (PC4-23400) C16 Desktop Memory - Black PC Memory CMW32GX4M2Z2933C16 at Amazon.com