My current work-in-progress build, with dual Xeon E5-2658 V3's (24 cores/48 threads @ 2.3ghz), 64gb of DDR4 ECC ram, and (temporary) dual R9 390x's. No over the top RGB, no mini-itx minimalism,
Supermicro SSG-2027R-AR24 Storage 2U Barebone Dual Intel Xeon E5-2600 and E5-2600 v2 processor Up to 1TB DRAM LRDIMM SATA3, SAS2 Dual 10GbE, IPMI LAN port | Wiredzone
Amazon.com: SHANGZHAOYUAN X99 Dual CPU Motherboard LGA 2011-3 Server Motherboard for Intel i7 5th/6th Gen Xeon E5 V3/V4 Series (E-ATX, 8*DDR4 ECC Max 256G, 2*NVME M.2, 2*Gb LAN, SATA 6Gb/s, PCIe 3.0) :