New GPU for 2010 Mac Pro??? Need advice please.

Hi there,

I'm running a mid-2010 Mac Pro 5,1 with an NVIDIA Quadro 4000 GPU, [full specs below].

I've been told by RedGiant that I need to upgrade my GPU to something that has at least 4GB VRAM in

order to use many of their apps in a 4K workflow.

But, after a bit of Googling, I see that this is not such a simple operation.

As I understand it, there aren't any natively supported Mac GPU's, and people are speaking about

flashing boards, and who-knows-what.

I would love some expert advice about which GPU is compatible with my system, and what I'd need to do in order to install it.

I've seen the Radeon 580 [4GB or 8GB] come up often - but perhaps there are

better options I'm not aware of.

Thanks so much in advance.

8 Core Mac Pro, (Mid 2010) 32GB RAM,

NVIDIA 4000 CUDA Card

OSX 10.12.4

Premiere Pro: 2017.1.2