Old thread I know but I have been doing a lot of homework as suggested.  I am stuck on what is necessary and what is overkill on graphics cards.  I have one builder suggesting a

PNY VCQFX370-PCIE-PB Quadro FX370 256MB 64-bit GDDR2 PCI Express x16 Workstation Video Card

newegg has a whole category of workstation graphics cards. 

Is there a good reason to go to a cad work station card?