3200cl14 vs 3800cl14 5800x 1440p 1% lows | TechPowerUp Forums
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
DDR4 3200mhz cl16 or DDR4 3600mhz cl18 for a i9 9900k @5ghz - CPUs, Motherboards, and Memory - Linus Tech Tips