
Stephen P. answered 05/10/19
Lead 3D Generalist with 20+ of Industry Experience
So, this could be a pandora's box type of question, as there are many levels of adequacy for a GPU when it comes to working in 3D. These days, a lot of tasks are being shared between the GPU and CPU, or being driven completely by the GPU instead of the CPU for rendering. When you're making the decision to invest in a GPU/hardware setup, you have to make wise decisions based on your budget, what you plan on doing with the software/hardware, and how long you expect your investment to last.
If I were looking at new hardware, I might investigate options that have more VRAM (video RAM) that will allow your GPU (video card) to basically store and use more information, and often more rapidly. This comes at some expense though, so find a middle ground that works for you. Hop online and read lots of reviews by folks who are looking to do the same type of work (or who are doing the type of work that you want to do), and see what's being said.
At the end of the day, unless you're already an intermediate-advanced Maya user demanding more performance, you may be fine with entry-level, current generation GPUs. Your GPU will be used heavily by the viewport (so, how you interact with Maya), but it can also be relied upon for rendering. If you're into Game Development, your GPU will play a key role in the functionality of your development pipeline, so pay super close attention to what you're choosing.