> It's two 1.83 chips on the same silicon. It's twice as fast. It's not quite so literal. If you go back and look at the benchmarks for the dual processor Macs, even they aren't "twice as fast" as the comparable single processor models would have been. And as Tom said, there are far too many variables involved. BRIAN PEARCE <http://www.redjacketpress.com> "Yesterday's Books for Today's Reader"