G.SKILL 16GB (2 x 8GB) TridentZ Series DDR4 PC4-32000 4000MHz for Intel Z170 Platform Desktop Memory Model F4-4000C19D-16GTZ at Amazon.com
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
HyperX Predator DDR4 RGB 16GB Kit of 2 (2 x 8GB) 4000MHz CL19 DIMM XMP RAM Memory with Infrared Sync Technology (HX440C19PB3AK2/16) at Amazon.com
Amazon's Best RAM of 2020: Here Are The Fastest Memory to Speed Up Your PC | Tech Times