Asus made a crypto-mining motherboard that supports up to 20 GPUs - The Verge
B75 Mining Motherboard 8 USB 3.0 to PCI-E 16X Graphics Card LGA 1155 with CPU DDR3 SATA HDMI Bitcoin BTC ETH Miner Type6 - Walmart.com
Szmz Cryptocurrency Mining Rig Motherboard 8 Gpu Eth Combo With Cpu Mineradora Criptomoedas Plate Carte Miner Mining Laca Base - Motherboards - AliExpress
The ASUS H370 Mining Master connects 20 GPUs to one motherboard with PCIe over USB - Edge Up
ASUS B250 Mining Expert Power Kit. For the Mboard + GPU's - Parallel Miner