HDD: 6 x SATA 6Gb/s ports / / 2 x M.2 x4 Socket 3, with M Key, type 2242/2260/2280/22110 storage devices support (both SATA & PCIE mode) / 2 x U.2 connector
Expansion Slots: 4 x PCIe 3.0/2.0 x16 (single at x16, dual at x16/x16 mode, triple at x16/x8/x8 mode or quad x8/x8/x8/x8 mode) / 1 x PCIe x4 (max at x4 mode).