I've got mid- range pc with gtx 1050 Ti ,I5 7400, 16 gb 2400mhz ram,msi b250m motherboard. I was going to buy new gpu: gtx 1660 or 1660 Ti, but my cpu could sometimes bottleneck, but I7 7700k is more expensive and doesn't give as huge fps boost as gpu would do. I don't know which one to choose.