I used the cake walk installer and an 8Gb pengrive to install a v.similar system. (bought an X58A UD3 so I could make a second PTHD system using a cheap PCI core card).
I have the same graphics card and run 2 monitors and have had this problem with only one plugin which is my wrapped VSTs for my liquidmix. window opens but is white where the controls are supposed to be. I can however see the PT parts of the window ie I can change channel and plugin.
Can you see anything in ur plugins window. Also what version of PT software are you running because I had a lot of problems before I upgraded to the latest 8.