Arch Memory 16 GB (2 x 8 GB) 288-Pin DDR4 UDIMM for Dell XPS 8900 RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 16gb Upgrade for Dell XPS 8900 Incudes 2 x 8GB Modules 4 upgradeable sockets, 64gb Max, 8GB Max Per Socket, Match Pairs Required DDR4-2133 PC4-17000 288-Pin Non-ECC Unbuffered 1.2 volt Cas Latency 15