Does anyone know if a pair of E5450 Harpertown Xeons will work in a 2,1 Mac Pro in place of the original X5365 Clovertown version? Both models are the LGA771 package and have a 1333 FSB. Are there firmware issues that will prevent the E5450 from working? I have read the forums here, and other sources, but haven't found a definitive answer. Thanks for any info you can provide.