Don't mean to bump this unnecessarily, but I can vouch for the CPU's cores giving a stronger edge than merely upgrading the video card. I bumped up to an RTX3050 expecting it to work miracles since my previous one was and AMD card which didn't allow GPU rendering. It really did make a difference, up until the GPU cache filled, then it would revert to the slow CPU rendering. (CPU fallback in Daz Studio) So I recently bit the bullet and upgraded from a Ryzen 5 with 6 cores to a Ryzen 9 with double that. The difference was far greater than the GPU upgrade. With the Ryzen 5, I could easily just start a heavy render before bed and it might be finished before my morning coffee. Now two hours is the max.