The IO panel features only 4x USB 2.0 ports (the lowest one below the PS/2 connector is for USB BIOS Flashback), PS/2 Keyboard/Mouse, BIOS Flashback button, Display Port, HDMI port, 1x USB 3.1 Type-C, 1x USB 3.1 Type-A, 2x USB 3.0, RJ-45 1GBit NIC port, and TOSLINK connector with gold plated audio jacks. Some people might be a little surprised to see so few USB 3.0 ports on the back panel, and ASUS could have added a few more. However, I believe that ASUS designed this board to be kind of like a barebones overclocker, and overclockers prefer chipset IO to hubs and controllers, and in that regard the USB 2.0 count on the IO panel becomes more acceptable.