Asrock Pro Micro ATX Motherboard H55M PRO Memory support: 4 slots: max 8GB DDR3 (1,600MHz) Intel HD Audio via VIA VT1718S with 8-channel support CPU support: LGA1156 Core i3, Core i5 11 x 10 x 2 inches ; 2 pounds and Core i7 Expansion slots: Two 16x PCI-E 2.0 slots