Anandtech reviewed the Supermicro C9Z490-PGW Motherboard
A quote from the article:
More widely known for its server-grade models, Supermicro always launches a small number of consumer motherboards, sometimes with some extra flair and hardware we dont see from the regular vendors. This time around, Supermicros top-tier C9Z490-PGW uses a PLX chip which enables the board to operate with dual PCIe 3.0 x16 or quadruple PCIe 3.0 x8 slots. This is combined with dual PCIe 3.0 x4 M.2 slots from the chipset, a 10 gigabit Ethernet controller, and a Wi-Fi 6 interface which makes the C9Z490-PGW versatile for a wide array of users.Supermicro C9Z490-PGW Motherboard Review