|I will defer to jam on that question.|
I wasn't suggesting that you buy that particular RAM. I posted another link in the same response that showed all the 1.5V RAM newegg.com has listed. Some of it has notations that it is approved for your application.
The point is this. The standard for DDR3 RAM is to run at 1.5V. Many vendors juice their RAM by running it at higher voltages. Higher voltages mean more heat and shorter life.
IMO RAM that is sold as PC1333 that runs at 1.5V is a better product than RAM that is sold as PC1333 at higher voltages like 1.7-2.0V.
I am suspicious of recommendations by Autodesk. Not sure they are on the up and up. Look at the specification requirements and buy a card based on that.
Going to the PSU, the most power hungry cards draw as much as 205Watts. That translates to 17A @ 12V. Your processor may be 125W. Then you have all the other hardware like drives and fans all drawing off the 12V rail.
If you were to change your mind and go with two high end graphics cards you are looking for a PSU with a single 12V rail @50A or so. Look at the link below for a PSU suggestion.
I am a bulilder by trade that uses residential CAD programs. I have used Autocad in the past and I can see the benifits of multiple screens. You may want to look into Matrox graphics cards.
One thing I am not up on is if you can connect multiple displays when using SLI or Crossfire. You could get at least 4 displays out of that possibly more.