<< Im running default everything and my processors (MP 1600 1400MHZ) are running at 49 and 53 with the case open (they have always been a few degrees different even on the Tiger MP board). Im sure underclocking would reduce the load somewhat but how much I dont know. Mookow would know better than I. >>
You could undervolt the CPUs a bit to bring down the temps a few degrees. One of my friends dropped his T-Bird's temps by 10 degrees F (but he was able to get his T-Bird running at 1.525V). mastertech01, if you're interested in that, you'd have to connect a few bridges on the CPUs (I am fairly sure you can do it with MPs, I know you can do it with T-Birds), since your mobo doesnt support any OCing options. Freejack2, you should be able to undervolt through BIOS, considering you have an Asus board. You might not be able to, but by and large, Asus boards let you do it...