Socket 1151 mainboard series asus b250 form factor atx supports multi core processors quadcore compatible cpus intel core i3 intel core i5 intel core i7 processor codenames skylake kaby lake chipset intel b250 memory slot 4 ram operation mode dual channel ram type ddr4 memory clock speed 2 400 mhz specification pc4 19200 maximum memory expansion 64 gb pcie 30 pcie 20 support number of pci x x 16 slots 2 number of pci x x 1 slots 2 number of pc