PCI Express x16: 1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the PCI Express x1 slots. The PCI Express x1 slots will become unavailable when a PCIe x4 expansion card is installed.
* When installing a x8 or above card in the PCIEX4 slot, make sure to set PCIE Slot Configuration (PCH) in BIOS Setup to x4.
Memory Standard: DDR4 2933 / 2800 / 2666 / 2400 / 2133*
* Core (i9/i7) support DDR4 up to 2933; Core (i5/i3), Pentium and Celeron support DDR4 up to 2666.
* Please refer to Memory Support List on ASRock's website for more information. (http://www.asrock.com/)