Im still undecided whether to get the mac pro with one or two 2.8 GHz processors. One of the factors I take into account is how many watts the machines use. The TDP of these processors is 80 Watt. Two processors would make a maximum of 160 Watts. But lets say that at a certain point in time, I would be reading my email only. Not a processor intensive task at all. How many watts would be used then, when you would compare the dual processor to the single processor? Would the processor-part of a dual processor Mac use twice as much electricity, because two Xeons sit in it? Or would it be less, because the task Im performing is not processor intensive? Could someone please shed a light on this?