Z270 only had room for 2 onboard - I'm thinking about getting a couple of these:
https://www.newegg.com/Product/Product.aspx?Item=N82E16813130968&cm_re=MSI_Z270_XPOWER_GAMING_TITANIUM-_-13-130-968-_-Product
They look like they can have 4 GPU's on board which I wanted to test out - if anyone has any experience I'd like to know.
As long as the motherboard has any sized PCIe slot (1x - 16x) you can purchse PCIe risers like this: https://www.amazon.com/PCI-E-Powered-Riser-Adapter-Extension/dp/B06XHVTCRF/ref=sr_1_6?s=electronics&ie=UTF8&qid=1495766268&sr=1-6&keywords=pcie+riser and just plug the riser into the motherboard and the card into the riser. Mining doesn't use that much slot bandwidth so mining performance is unaffected on the bus speed.https://www.newegg.com/Product/Product.aspx?Item=N82E16813130968&cm_re=MSI_Z270_XPOWER_GAMING_TITANIUM-_-13-130-968-_-Product
They look like they can have 4 GPU's on board which I wanted to test out - if anyone has any experience I'd like to know.
I'm currently using a mobo with 3 16x slots and 3 1x slots and using those risers in all the slots to be able to use 6 cards.
Since you already have an AX1500i you could just buy more cards or use those 470s and the 1060 and the risers and plug them into any open PCIe slot on your motherboard but you might have to do some research to see if your motherboard can hold 4-5+ GPUs.
Yeah I wanted to do riser-less builds to test them out for now - I'll probably toy with a riser build in the future to run it side by side with a 4 card no riser build.
For now I just came home to some different 1080's to play with
