Gigabyte LGA1151 Intel Z170 ATX DDR4 Motherboards GA-Z170-HD3P LGA 1151 Memory: 4x DDR4 DIMM Slots, Dual Channel Slots: 1x PCI-Express 3.0 x16 Slots, 1x PCI-Express 3.0 x4, 2x PCI-Express 3.0 x1 Audio: Realtek ALC887 High Definition Audio CODEC Storage Interface: 3 x SATA Express, 6 x SATA 3, 1 x M.2 USB: 1 x USB 3.1 (A+C); 7 x USB 3.0 ports; 6 x USB 2.0 ports ATX Form Factor; 30.5cm x 19.9cm