Just a few quick question for the seasoned Mac users. My buddy bought a new 2.8x2 Octore Mac Pro from the apple store last week with the stock 2GB of RAM. He decided that he wanted another one as a server, so he ordered one from apple.com with a few upgrades (8800 video card, wireless keyboard etc). While he's waiting for the new, "Server" one to ship, we've been looking at upgrading the RAM on both units. Apple recommends having at least 4 chips in at minimum and to install in matching pairs. Will this really give a performance increase? The base machine has 2x1GB sticks. He originally wanted to just buy 2, 4gig 800mhz OWC memory chips and call it done. Any recommendations would be great. Thanks!