G.SKILL TridentZ RGB Series, 16GB (2 x 8GB) DDR4-4266MHz 288-Pin SDRAM Desktop Memory with CL19

They are samsung b-die so you can lower the frequency and get better timings :) i have 4x8gbs modules no issues at all, please make sure to keep them in low temps, if you get more than 44°c, it would be a problem.

my sticks 2pair - quad channel on ASUS ROG RAMPAGE VI EXTREME with Intel Core i9-7900X Processor / 7980XE Processors.nice work range, low voltage.-quad channel- 2666MHz 14-14-14-34-1T 1.18V 2800MHz 14-14-14-34-1T 1.20V 3000MHz 14-14-14-34-1T 1.22V 3200MHz 14-14-14-34-1T 1.24V 3400MHz 15-15-15-35-1T 1.26V 3600MHz 16-16-16-36-1T 1.28V 3800MHz 17-17-17-37-1T 1.30V 4000MHz 18-18-18-38-1T 1.35V4200MHz over cannot running.maybe my cpu imc is a limit.7900X running 4000MHz CL18 1.35V7980XE running 3800MHz CL17 1.3V...and beautiful rgb lighting :)

I originally bought this as an upgrade to my 3200 mhz ram, because a certain product I use is unfortunately super reliant on RAM speed.While being fully compatible with my system(on paper) this RAM is incredibly unstable and causes a significant amount of crashes even when underclocked. Forget about overclocking, this cannot get even remotely close to the advertised speed. In order for my system to be stable, I had to underclock it down to 1600 mhz, while my previous RAM was able to hit 3200 mhz(it's advertised maximum) with absolutely zero problems. I would not recommend this ram whatsoever.

Got two sets for 32gb to run in all channels and this ram is exactly what is says and rgb 🤷🏼‍♀️ No complaints and no issues