Okay, I did quite some research , to no avail, now I'm wondering if someone can point me to a solution. I'd like to put two harddrives into my 2008 MacPro, in addition to the 4 drives already installed in the bays. There are 2 extra Sata ports on the motherboard, so I figure I need to get a Sata-Sata cable, build some sort of tray to fit the drives securely into the lower DVD drive bay, so far so good, no big deal; I understand the extra Sata ports are more easily accessable in the 2008 MP. But how about power , will I need some extra power supply, or does the Sata cable take care of that ? I know about the brackets one can get for external eSata drives, and this solution . Basically, I'd like to DIY the maxupgrades kit, looks like just a pricy tray to my untrained eye, or is there more to it ?