pay $30 extra for 3600 CL18 or buy 3200 CL16 (Ryzen 3rd gen CPU) - CPUs, Motherboards, and Memory - Linus Tech Tips
Amazon.com: v-Color Prism Pro DDR4 16GB (8GBx2) 3600MHz (PC4-28800) CL18 RGB Gaming Desktop Ram Memory Module UDIMM Hynix IC Single Rank - Glacier White (TL8G36818D-E6PRWWK) : Video Games
DDR4 3200mhz cl16 or DDR4 3600mhz cl18 for a i9 9900k @5ghz - CPUs, Motherboards, and Memory - Linus Tech Tips