Hello, I've got 2 graphics cards for my Mac Pro, both require 2 PCIe ports, and of course my Mac Pro only has 2! I was reading around forum, and I can get additional power by using this setup Although, thats a lot of mess and effort for an extra PCIe. I was thinking, isn't it possible to feed the additional power from my second DVD slot (not used)? Or even use Y splitters (personally, I don't feel safe using this method though)? As my main Graphics Card, I have the ATI Radeon HD 4870 512MB thats powering a DELL U2410 Ultra Sharp, and an ordinary DELL E176FP (classic office style). My secondary Graphics Card, is a ATI Radeon X1900 XT that 'used' to power also another DELL E176FP. Although, when I upgraded the Mountain Lion, I get nothing through it, just a warning message about the lack of power... Before, I used to also get that message, but it would still try and power up. Anywhoo, please give me your expert advice. Oh, and its a MacPro Quad-Core Intel Xeon 2.26GHz. Thanks!