This is a highly binned 32GB GSkill Trident Z 32GB dual rank two dimm kit. I bought it July 1st. I have used it in my new Ryzen9 3900X build. I have been running it at 3733mhz at 16-16-17-17-36…

FS:G.skill Trident Z F4-4000C19D-32GTZKK 32GB DDR4 4000 CL19 2 dimm set $245

Source: [H]ardOCP – FS:G.skill Trident Z F4-4000C19D-32GTZKK 32GB DDR4 4000 CL19 2 dimm set 5