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I checked out 3DS Specs and they only recommend NVIDIA QUADRO or AMD Firecrest, but apparently that's a really outdated position based upon what's now substandard chip architecture so tests with 'consumer grade' quad core cards like the GTX 1070 actually show a better performance. I think the main problem after that is bottlenecks with RAM amounts so pure professional machines used for lots of complex rendering have 64GB, but any system with that amount that I've seen is $$$$$$$$$$$
The only pooter I could find with 'pro' Quadro spec within my budget was https://www.europc.co.uk/dell-precision-3620-mini-tower-workstation-windows-10-pro-64-bit-intel-xeon-e3-1240-v5-3-5ghz-16gb-ram-256gb-ssd-dvdrw-4gb-nvidia-quadro-k2200-dell-3-year-warranty-119910.html?utm_source=google_shopping&gclid=CJO2is3Z9NICFW0R0wodyMYDwA
again, refurbed but half price of the normal unit and almost identical in spec in every other regard as the i7 is also quad core but higher frequency so I could use the difference in price to boost the RAM to 32gb?
Which app are you/will you be using. Better to find whether they're optimised for a particular card or CPU before you splash out on something that may not help at all.