Read the description on the product page of the memory: "Compatible with Dual Channel Intel Core i5 CPU for P55 chipset motherboard, Dual Channel Core i7 CPU for P55 chipset motherboard, and
AMD AM3 Platform."
Just a warning though: most Ripjaws kits
do not play well on AM3 platforms.
But you should be fine at 8-8-8 1333mhz