I have recently picked up my first Mac pro 1.1 (2x 3.0 mhz X5160's, 4gb ram, and 500gb HDD) on ebay for $788 shipped to my door. Is this a good price?? Anyway my real question is this; The Mac Pro came with 667mhz ram, is this the max speed ram this system can accept?? I am upgrading to dual X5355 processors which have a 1333mhz front side bus speed, does this mean i can use ram rated at 1333mhz? or am i stuck at 667mhz with this system?? I want to squeeze as much as i can out of this system, i am doing HD video editing, and music production with it. Any help is greatly appreciated, as i need to know before i can order my ram upgrade. Thank you.