Amazon.com: ASUS B250 MINING EXPERT LGA1151 DDR4 HDMI B250 ATX Motherboard for Cryptocurrency Mining (BTC) with 19 PCIe Slots and USB 3.1 Gen1 : Everything Else
This crypto-mining Asus motherboard supports 20 GPUs, because 19 wasn't enough - CNET
BTC-S37 Mining Motherboard Set, with CPU 128GB MSATA SSD and 8GB Memory DDR3 8 GPU Mining Motherboard Kit, Compatible with Bitcoin Eth and other multi-currency mining - Newegg.com
B250 MINING EXPERT|Motherboards|ASUS Global
B250 BTC Mining Motherboard 12 PCI-E Support 12 Video Card LGA 1151 DDR4 Memory USB3.0 for BTC Machine Bitcoin Mining - Walmart.com