read about another adapter at techpowerup. turns 6 slot mobos into 8 slot mobos.

https://www.techpowerup.com/233317/biostar-releases-accessory-to-convert-your-gaming-pc-into-a-pro-mining-rig

8 cards with an adapter. works with the following mobos: RACING H170GT3, GAMING H170T, Hi-Fi H170S3H, Hi-Fi B150S1, Hi-Fi B150S1 D4, or TB150 PR

i would rather go with the lightning board if i can find 8 single slot cards. much neater and smaller package.