Biostar has expanded their dedicated mining portfolio with the TB250-BTC+ motherboard that features 1 x PCI-E x16 3.0 slot plus 7 x PCI-E x1 3.0 slots. This model is designed for DIY people who intend to build home mining rigs.
https://www.notebookcheck.net/Biostar-announces-world-s-first-8-Slot-PCI-e-mining-motherboard.237048.0.html