oh ok its a socket 754 (for some reason i thought nforce4 was for socket 939 only.........) so it makes sense that its 2.2ghz since its socket 754.
well that means that you won't have to worry about dual channel... but i really don't know what you could do other than getting a matched stick.. (not saying thats the only way.. but since i'm noob thats all i can think of)