Hi I am thinking about getting a new GPU for my Mac Pro (Early 2008). I run Windows 7 64bit all the time. I plan to take out the old 8800GT and keep it safe until needed. I am thinking about getting either a Gigabyte 460 SOC or a Gigabyte 560 Ti SOC. It has to be Nvidia and these seem like great value for money. I have brought a spare Mac PCI-Express power cable and now have a total of two. The reviews at Guru3d suggests that the max power needed is about 350 watts for both the 460 and the 560 - or am I reading it incorrectly?! I think I read somewhere that the Mac Pro (Early 2008) would output a total of 300 watt PCI power. Question: Has anyone successfully installed same or similar setup? Will my Mac Pro be able to handle the power requirements using two PCI-Express cables or do I need to rewire power directly from the PSU to the GPU? If the latter is the case what do I need and how do I do it? Suggestions to better value/performance Nvidia GPU's are welcome - btw. I hate noise. Thanks!