16GB Total. 2pcs 8gb DDR4, 2400MHz, ECC, CL17, 2R, X4, 1.2V, DIMM, 288-pin Brand BY Computer Memory Solutions LIFETIME WARRANTY BY Computer Memory Solutions Maximum Memory: 128
GB Expansions: 8 Socket (s) Memory will clock down to run at optimal speeds depending on processor model installed.
Compatible with: ASRock Motherboard D1540D4I, Fatal1ty X99X Killer, Fatal1ty X99X Killer/ 3.1, X99 Extreme11