Socket 2011 3 motherboard series asus x99 form factor atx supports multi core processors 18 core compatible cpus intel core i7 extreme edition processor codename haswell e chipset intel x99 cpu support to 160 watt memory slot 8 ram operation mode quad channel ram type ddr4 memory clock speed 2 133 mhz memory clock speed oc max 3 333 mhz specification pc4 17000 specification oc max pc4 26660 maximum memory expansion 128 gb pcie 30 pcie 20 s