Please do remember that a CPU has to handle the background stuff, the GPU and then its own jobs for the game.
An i3 will certainly struggle to keep up.
You may want to look into getting a better LGA1150 CPU, maybe an i5 of which the best for that socket is an i5 4670K.
https://uk.pcpartpicker.com/product/DNrG3C/intel-cpu-bx80646i54670k