Socket am3 mainboard series asus sabertooth form factor atx supports multi core processors 8 core compatible cpus amd fx amd athlon ii x2 amd athlon ii x3 amd athlon ii x4 amd phenom ii x2 amd phenom ii x3 amd phenom ii x4 amd phenom ii x6 amd sempron 100 series processor codename bulldozer chipset amd 990fx cpu support to 140 watt quickpath interface 52 gts memory slot 4 ram operation mode dual channel ram type ddr3 memory clock speed 1 866 mhz s