Your CPU will hold up quite well, however your PSU only barely passes. By that I mean it lacks the necessary two 6pin connectors needed for the 5850. Not that it is not powerful enough, one 5850 need 500w and crossfire 600w, which obviously your 650w passes with flying colors. It is mostly recommended that your PSU have the necessary power pins to run the graphics card, you can use those 4pin Molex to 6pin adapter cables to get your two 6pins, just be sure to spread the load out over both strands of 4pin Molex’s for best compatibility and stability.
edit: spelling