Socket am3 mainboard series gigabyte ga 990 form factor atx supports multi core processors 8 core compatible cpus amd fx processor codename vishera chipset amd 990x cpu support to 220 watt quickpath interface 52 gts memory slot 4 ram operation mode dual channel ram type ddr3 memory clock speed 1 866 mhz memory clock speed oc max 2 000 mhz specification pc3 14900 specification oc max pc3 16000 maximum memory expansion 64 gb pcie 20 suppo