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
LGA 3647 - Wikipedia
EVGA SR-3 Dark Motherboard: LGA3647 For Intel Xeon W-3175X
Dynatron B4A Intel LGA 3647 Narrow ILM CPU Cooler for 1U Rackmount, 20 – MITXPC