ASUS Pro WS C621-64L SAGE/10G Intel LGA 3647 CEB Workstation Motherboard with Dual Intel 10G LAN and Support for 4 GPUs, 12 DIMMs, 10 SATAs, M.2, USB 3.2 Gen 2 - Newegg.com
ASUS ROG Dominus Extreme Intel LGA 3647 for Xeon W-3175X (C621) 12 DIMM DDR4 | eBay