Oh Great Ones, I humbly bow before your wisdom and knowledge.

I'm looking for an X99 motherload, I mean motherboard, that will support three GPUs (RX 480s) without risers. If I understand correctly, each GPU will need a working (non-shared) PCIe x16 slot of its own. Two running at x16 and the third one running at x16 or x8. With proper spacing, ventilation and PSU. I will have a 40 lane CPU. So if this info is correct any of these these MOBOs should fit the bill: ?

https://www.newegg.com/Product/Product.aspx?Item=N82E16813157543

https://www.newegg.com/Product/Product.aspx?Item=N82E16813132516

https://www.newegg.com/Product/Product.aspx?Item=N82E16813130948

Please add anything that will be helpful. Thanks in advance!