Processor / System Bus 2 x Socket P (LGA 3647) 1st and 2nd Gen Xeon® Scalable Processor Family *Refer to support page for more information UPI (10.4 GT/s) Generation E9 Core Logic Intel® C621 Chipset Memory Total Slots : 24 (6-channel per CPU, 12 DIMM per CPU) Capacity : Maximum up to 3072GB RDIMM Memory Type : DDR4 2933/2666 RDIMM DDR4 2933/2666 LRDIMM DDR4 2933/2666 LR-DIMM 3DS Intel® Optane DC Persistent Memory Memory Size : 32GB, 16GB, 8GB, 4GB RDIMM 64GB, 32GB LRDIMM 128GB, 64GB LR-DIMM 3DS 512GB, 256GB, 128GBIntel® Optane DC Persistent Memory * Refer to support page for more information * Actual memory frequency differs from Intel CPU types and memory module. Please check Intel official site for more detail about the memory types supported by each CPU. * Intel® Optane DC Persistent Memory for 2nd Generation Intel Expansion Slots 2 x PCI-E x16 (Gen3 x8 link) or 1 PCI-E x16 (Gen3 x16 link), FH, HL (CPU1) 4 x PCI-E x16 (Gen3 x8 link) or 2 PCI-E x16 (Gen3 x16 link), FH, HL (CPU2