Hi I need some info. I have a Windows 7 x64 ultimatte, Gygabite HD 7950 3gb ram video card running with the latest catalyst drivers, AMD fx8350, 16gb ram and 2 HDD. I use Maya 2012 and Arnold render, but for some reason when I color pick or make a ramp material in MAya it hangs up! and stops working. Should I roll out to a standard microsoft windows 7 x64 ultimatte driver or maybe the catalyst driver is making all the error?