No point leaving it about, SEND it back if possible. You MIGHT not be able to get money back so if you get a new one it could work. Always worth a try rather than leaving a CPU HANGING about. Otherwise you could try taking it to a shop to get tested, but they'd charge for that. If you or a friend have a different computer with an AM2 socket (which i'm GUESSING you're using) then you could try using it in that. No, it's a Socket 939.