[frcguy]

Originally Posted by Cory

You're not wrong. Any recent one would be fine. It's just that the cheapest quadro card is way better.

A $160 Quadro K620 will beat the pants off of every GTX card on the market when running Solidworks in shaded with edges mode (which is my preferred mode and I assume the preferred mode of most).

At 1080p a $1000 12 GB Titan X is 33% worse than the $160 K620.

You can see a more detailed breakdown here

[edit]: I didn't read that Inventor was the choice here. Dave's comments below are probably pretty relevant, especially if it will be a computer for mixed use (CAD/gaming). I'm sure you can find similar comparisons to the one I linked above for Inventor performance.

I know this thread is mainly about Inventor, but after seeing Cory's post I thought I'd share a bit of experience I have.

We did a little comparison between our CAD workstation with a Quadro 600 (released in 2010), and my home desktop with a Radeon R9 380X (released in 2015). Both systems are identical with the only difference being the GPU. Running the Solidworks built-in performance benchmark, the system with the Quadro can beat my system with the gaming GPU every time in terms of GPU performance.

Goes to show that the system with the 6 year old Quadro can easily eclipse a modern and fairly current gaming card.