Socket 1150 mainboard series asus h81 form factor atx supports multi core processors quadcore compatible cpus intel core i7 intel core i5 intel core i3 intel pentium intel celeron processor codename haswell chipset intel h81 memory slot 2 ram operation mode dual channel ram type ddr3 memory clock speed 1 600 mhz specification pc3 12800 maximum memory expansion 16 gb pcie 20 support number of pci x x 16 slots 1 number of pci x x 1 slots 2 number