I'd say it's time for a CPU upgrade, I'd even say stick with the 1050Ti for now till Nvidia releases the 1650 and then decide if it's worth the upgrade.
I'm not certain you read the OP correctly. He doesn't have the 1050 ti yet. Anything he's got now, has to be unsuitable, since the 1050 cards just make it @ 1920 x 1080.
So, the graphics card has to go before the CPU. And FWIW, if his C:/ drive is a spinner, that has to go before the CPU as well.
His CPU is the Clarkdale series. It clocks @3.20, has turbo boost to 3.46 GHz. The very top of that line is only 3.6 GHz and AFAIK, the 1156 socket doesn't go past Clarkdale.
IMO, CPU replacement, particularly going from quad to quad, would yield the least tangible result.
Although, FWIW Maiku Tech's link has used and "refurbished" higher number i5-6xx CPUs for about 50 bucks.
This entire discussion would be much clearer if our TS had included what his current rig has in the way of a video card & C:/ drive.
There are some of the new 1660 cards on the street, but AFAIK, not the 1650s. (Might want to fact check that). The 1660s are running around $300.00