Can I upgrade an old Mac Pro with NVIDIA GTX 980 for Cycles?

Hi All,

This is my first post so please be gentle with me. I have been using blender for a few years and have been getting more into it recently. I’m considering buying another machine with the express intention of using it for Blender.

Disclaimer: Just to get it out there ahead of time - I know that I could build a Windows PC for £1,000 that would give me good rendering performance but I have been a Mac user for decades and I would prefer to stick with the system I’m familiar with.

With that out of the way…

I’ve started seeing older Mac Pros (2009/10) on eBay for reasonable prices ~£500. If I bought one of these, maxed the RAM (16Gb) and upgraded it with a modern graphics card like an NVIDIA GTX 980 would I be likely to see the sorts of results in the benchmark videos online for that card? i.e. around 30s for Mike’s BMW scene.

Or is there something I’m missing?

Thanks in advance.