This product is either discontinued or we cannot get that from suppliers.
ASUS WS C621E SAGE(BMC) LGA 3647 EEB FF , Intel C621 chipset, 12x DIMM DDR4 (Max. 768GB) Memory, 2x PCIe X16 (X8 mode), 2x PCIe X16 (single at X16, dual at X8/X8), 3x PCIe X16 (X16 mode), Realtek ALC S1220A 7.1-Channel High Definition Audio, 8x SATA 6Gb/s ports, 1x M.2 connector, 4x U.2 connector, USB Ports: 7x USB2.0, 8x USB3.1 Gen.2, 2x Intel I210-AT Gigabit LAN.
ASUS WS C621E SAGE accommodates up to four dual-width graphic cards with a four true PCIe Gen3 x16 link to unleash maximum graphic performance. With support for up to 4-way NVIDIA® SLI™, AMD CrossFireX.