I'd be really worried about thermals. The cards are very close to each other for an open air case, I'd expect it would need a case and enough fans to create som

I'd be really worried about thermals. The cards are very close to each other for an open air case, I'd expect it would need a case and enough fans to create some air pressure. There is some weird parts about mining rigs that I don't really agree with. "pcie risers" - as the author pointed out mining rigs usually go for 1x PCIE risers through USB cause they don't care about bandwidth - but that doesn't mean you need to go for that as well, you could have gone for 16x PCIE risers just fine which is just a long ribbon cable usually shielded. "mining rigs use crappy PSUs from alibaba" - you can use whatever PSU you want.