With 3ds Max 2018 and the V-ray 3.60, I ran a simple rendering job where the frame size is HD (1920x1080). On a Sandybridge 8-core cpu (with hyperthreading it is 16) which is rather an old CPU, the redering took 16 mintes.
I also, ran that on a PNY Quadro M2000 and I checked that the GPU is fully loaded. It took 13 minutes to finish the job!
So, does that comparison make sense?