For Asus WS C621E SAGE C621 12 x DIMM DDR4 1536GB Workstation Motherboard - AliExpress
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Amazon.com: ASUS WS C621E Sage Extreme Power Intel® Xeon® Processor Workstation Motherboard for Two-way XEON CPU performance, with U.2, M.2 connectors, dual Gb LAN, USB 3.1 Type-C & Type-A, 10 x SATA