We just put this one together today - getting some pretty decent hash, roughly 5850 on ZEC. We haven't pushed it too hard yet but will probably be able to pull 6K hash pretty easily. Surprisingly easy build w/ z270a and a M.2 PCIE adapter.
https://www.youtube.com/watch?v=ChhUgclKgB8Wow, so you're actually getting full access to 8 GPU's under Windows?? Do you have links to the M.2 & PCI adapters you're using? That's incredible!
Edit: Are those the MintCell 006's? I had concerns about reliability based on the reviews...