G.SKILL TridentZ RGB Series 128GB (4 x 32GB) 288-Pin PC RAM DDR4 4000 (PC4 32000) Desktop Memory Model F4-4000C18Q-128GTZR - Newegg.com
32GB G.Skill DDR4 Trident Z Royal Silver 4000Mhz PC4-32000 CL16 1.40V Dual Channel Kit (2x16GB)
Royal Memory: G.Skill's 32 GB DDR4-4000 CL15 Kit for AMD & Intel
G.Skill 32GB DDR4 Trident Z Royal Gold 4000Mhz PC4-32000 CL19 1.35V Dual Channel Kit (2x16GB) at Amazon.com
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