So I have a 2008 8-core Mac Pro (Model 3,1) and I'm dual-booting OSX and Windows 7. I want to use Windows for gaming. It's lovely and all but I want to get a new graphics card for the Windows side, and I've settled on the GTX 460. I understand that the GTX 460 will not work on the OSX side, and I want to have both the current 8800 GT and the new GTX 460 installed while using the 8800 for Mac and the GTX 460 for Windows. I do not want to have to physically remove the GTX 460 every time I want to boot into OS X, I want the OS I am using to automatically use the appropriate card without physically removing or installing anything. I read this thread and it looks like what I'm trying to achieve is possible, but I'm confused as to the details of it. 1. Should I purchase this Molex 4-pin splitter or this PCI-E splitter? Is there a difference in installation methods? 2. Are there any additional peripherals I need to purchase to achieve my goal? Thanks so much! I've been searching for hours and I can't wrap my head around this stuff--I've never had to open up my computer so I'm a little nervous.