Review on Crucial 8GB DDR4 2133MHz Memory - CT8G4DFS8213: High-Speed, Unbuffered DIMM 288-Pin RAM by John Gray

Works great Dell XPS 8900 adds 2 x 8GB to fill memory slots. At the time of writing this review, this memory has the same specifications as the 8900 memory. The clock speed is 1066.7 MHz. Synchronization 15-15-15-36. Cheaper than Dell memory. I installed this memory directly from the Dell box prior to activation and the installer complained about the memory change and sent me to install it. I just finished the installation and rebooted the machine and went to the activation screen.