Depends on the game. Some of the newer games tap the CPU too. The 1050Ti is my go to card for mid range gaming at 1080p. But you must pull back on settings today to get the frame rate up.
Without knowing a game that needs help, I can't comment what to try next.
Also, the RAM SHALL BE IN DUAL CHANNEL and be 8GB. Your HDDs shall be in perfect condition.
I can check that out with a Web Speccy report. How? Read
So I have a AMD FX-4300 and a GTX 1050TI so I was wondering if my cpu was holding my gpu back and if I should upgrade it