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Asus made a crypto-mining motherboard that supports up to 20 GPUs - The Verge
ASRock Unveils The H510 Pro BTC+ Cryptocurrency Mining Motherboard, 6 Slots For Only $279.99
STEBCECE B250 BTC Mining Motherboard 12 PCI-E Support 12 Video Card LGA 1151 DDR4 Memory USB3.0 for BTC Machine Bitcoin Mining - Walmart.com
BTC-S37 Mining Equipment Motherboard CPU Set 8 PCIE 16X Slots Low Energy Eat Sound Card for Bitcoin Mining Mining Motherboard Cryptocurrency - Top Motherboards
B250 MINING EXPERT|Motherboards|ASUS USA
ZOTAC B150 Mining ATX Motherboard for Cryptocurrency Mining with 7 PCIe x1 Slots (B150ATX-A-E) : Electronics