Upgrade to i7? A 1060 and 32GB should be OK as long as you're not cranking settings way up.

Out of curiosity, do you use a slot swap macro? (hotkey that sets background clients to e.g. "maxfpsbk 12" and "renderscale 0.5" etc.) Background FPS makes a yuge difference in CPU usage, as does renderscale.

What client resolution?

Anything else running at the same time like Netflix, Chrome, etc.?