Last month I picked up a Quad 3.33 4,1 at a price that couldn't be beat and then just last week found a rather cheap official 5870. The 5870 fits my Mac needs perfectly, but I'd like to play something more graphics intensive on the Windows side. I've seen the threads about adding a second PSU but I found this article on Hardmac that says you only need to use a Sata to molex cable and some other stuff to get it to work. I don't know much about the innards of my Pro and I'd like to use all four HD bays and have a SSD in the second optical bay, would I be able to use the second ODD port to power the card? Finally would adding a card like a Blackmagic Intensity Pro cause any ventilation issues and could a cheapo PCI fan fix any issues that would come up?