AsRock Rack E3C256D2I Mini ITX Server Motherboard LGA 1200 Intel C256 4710483936890 | eBay
AsRock Rack E3C256D4I-2T Mini ITX Server Motherboard,Supports Intel® Xeon® E-2300 and 10th Gen Intel® Pentium® Series Processors,Single Socket H5 (LGA1200),Intel® C256. Server Motherboards - Newegg.com
28 Cores in Mini-ITX: ASRock Rack EPC621D4I-2M Motherboard for Xeon Scalable