HP Omen 900 MS-7A09 ( Munich-K ) OMEN X by HP 900-187na BIOS Munich-K motherboard top view Form factor: uATX: 24x24 cm (9.4x9.4 in) Chipset: Z170 Memory sockets: 4 x DDR4 Processor socket: LGA 1151 Expansion Slots: Two PCI-E (GEN 3) x16 socket One M.2 socket 1, key A One M.2 socket 3, key M