Correct PCI card for Mediator

[mongo]

I'm trying tomato sure to get the right video card for my Mediator 4000D. I'm worried that I might get the wrong card if I don't confirm with someone that a particular card is compatible. If I'm understanding correctly you need to use 5v cards for the Mediator 4000D. Is this correct? How can I tell if the video card is 3.3v or 5v?

http://digital.ni.com/public.nsf/allkb/5F0F91CFE6A09B9286256CAD0075457F