High CPU usage will be a defacto 'fact of life' with only a quad core CPU...at any resolution...
The 1060 3 GB variant (there were a few) is a 1080P card at best for most games, so, your card would likely use about half of it's available VRAM/framebuffer with a fast CPU, and, is already probably near saturation, where a faster CPU offers little improvement over average frame rates...
I'd try cranking up visual settings a little bit until frame rates fall too much due to GPU limits....;you might as well enjoy what scenery you can at whatever framerates the CPU and GPU can manage... (but, I'd avoid trying to 'fix' your CPU/GPU usage ratios with the latest fad theories on what some proclaim to be 'best')