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 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory (CMW16GX4M2C3200C16W) - PCPartPicker
CORSAIR Vengeance RGB PRO 32GB (2PK 16GB) 3.2GHz PC4-25600 DDR4 DIMM Unbuffered Non-ECC Desktop Memory Kit with RGB Lighting Black CMW32GX4M2C3200C16 - Best Buy