Hi there

You would definitely benefit from getting something like is Ryzen 2600X,2700X or newer 3600X, 3700X with B450 motherboard and 16GB of DDR4(32GB I would recommend get if you do rendering on CPU)

Ryzen 2nd generation like 2600X,2700X or 2800X are now priced pretty competitive and you will benefit from sheer speed in rendering, I'm still on X99 5960x which is OC 4.6Ghz but in CPU based render my CPU is spanked by AMD 3600X or 3700X

If you are need to render something very fast I'm very happy to help there, I use GPU for rendering and most of renders takes me up to 30-45 mins if I do very complex scenes at 60-90 samples that's at 2560*1440, like simple render with V4 or La Femme and simple scene etc it takes me at 1440p something like 3-5 minutes as max maybe bit more, I compared render engines in past like IRAY and SuperFly and both have been similar in rendering times

What I would recommend to use is Denoiser, you can try to use Intel or Nvidia denoiser, I use Intel one and no issues

Hope this helps

Thanks, Jura