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Amazon.com: ASUS WS X299 SAGE LGA2066 DDR4 M.2 U.2 X299 CEB Motherboard for Intel Core X-Series Processors with Quad-GPU Support, DDR4 4200MHz, Dual M.2 & U.2 Support : Electronics
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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
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