Then again, in the original post there was talk about spending money on dual Xeon E5 processors, 256GB of RAM, SSD drives, etc.
These CPUs start at about $350 each and go well over $3K, 256GB of registered DDR4 memory will set you back anywhere from $1500 to $3000 depending on configuration, and multiple SSD drives in a RAID configuration can bleed you dry.
So if you're already considering spending that kind of cash, what's a few hundred dollars for a video card?
What I was trying to do in my post is to get the OP to balance his spending spree by having him look at the video card first, as when it comes to CAD, it's one of the most important components of the machine.
Yes, it's true that lots of RAM and a good processor are key as well, but I would personally trade half of that memory for a good video card, because there is a "saturation" point with RAM, a point of diminishing returns if you will.
To print or, 3D print, that is the question...
SD3 printer w/too many mods, Printrbot Simple Maker Ed., FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.