CORSAIR VENGEANCE PRO 16 GB (2PK x 8GB) 4000MHz DDR4 C18 DIMM Desktop Memory with RGB lighting Black CMW16GX4M2Z4000C18 - Best Buy
G.SKILL 16GB Ripjaws V DDR4 4000MHz CL16 KIT F4-4000C16D-16GVK - iPon - hardware and software news, reviews, webshop, forum
G.Skill Trident Z Royal 32GB (2x16GB) DDR4 4000MHz CL16 - Silver - PC RAM G.Skill on LDLC
G.Skill Trident Z Royal 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-32GTRS at Amazon.com
T-FORCE Dark Z FPS DDR4 Runs At 4000MHz CL16 For 20% More Frames Per Second! – Pokde.Net
G Skill Trident Z Rgb 32gb 16x2 DDR4 4000mhz Cl16 for Sale in The Bronx, NY - OfferUp
Patriot Viper Steel DDR4 16GB (2 x 8GB) 4000MHz CL 16-16-16-36 UDIMM Low-Latency Gaming Memory Kits - PVS416G400C6K at Amazon.com
4000Mhz CL16 @1.45v (16-16-16-36) - I do not regret switching from AMD to Intel for gaming. I challenge you to beat these scores! : r/overclocking