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# of CPU Socktets: 1 (UP)
CPU Socket type: LGA 3647
Chipset: Intel C621
DRAM slots: 8
DRAM type: DDR4
Form factor: ATX
Onboard LAN: 1Gbit/s

Product information "ASRock Rack Motherboard EPC621D8A"

ATX 12'' x 9.6'' Supports 2nd Gen. Intel® Xeon® Scalable Processors / Intel® Xeon® Scalable Processors Supports Six Channel DDR4 2933/2666/2400/2133 RDIMM/LR DIMM, Intel® Optane™ DC Persistent Memory in memory mode (Cascade Lake only) Supports 13 x SATA3 6.0 Gb/s by Intel® C621 (including 1x SATA DOM ports and 2x M.2 ports) Supports 2 PCIe3.0x 16, 3 PCIe 3.0x8, 1 PCIe 3.0 x4 (share information mark in below table)