G.SKILL Trident Z 4000 MHz DDR4 @ TechPowerUp
 

The G.SKILL Trident Z sticks have been around for a while now, available in a multitude of colors and speeds, as well as with RGB. These 4000 MHz sticks are for all you non-RGB lovers out there, but with such a high speed, you best make sure your motherboard and CPU are capable.

https://www.techpowerup.com/reviews/...0C19D-16GTZSW/