G.SKILL Trident Z Royal DDR4-4000 MHz CL15 2x8 GB Review | TechPowerUp
G.Skill RipJaws V Series 32GB (4 x 8GB) 288-Pin SDRAM DDR4 4000 (PC4-32000) CL15-16-16-36 1.50V Quad Channel Desktop Memory Model F4-4000C15Q-32GVK at Amazon.com
G.SKILL Trident Z Neo Series 32GB (2 x 16GB) 288-Pin PC RAM DDR4 4000 (PC4 32000) Desktop Memory Model F4-4000C18D-32GTZN Desktop Memory - Newegg.com
4000 CL15 feedback - G.SKILL TECH FORUM
4000 cl15 on 64Gb dual-rank Micron Rev. B : r/overclocking