we need your specs. (info) to help.
sounds more like the game engine issue. also jump on the game forums aswell as here..
AMD FX(tm)-4300 Quad-core processor
16 gigs ram
MSI Radeon RX470 GPU
Im not certain what else you need please let me know if there is anything else.
that 4300 is hurtin ya im sure.. if you look most likely the 6300 is minumum. if your on budget i wouldnt go less than 8320fx. still kinda ruff that gpu and 8320 may work together and not bottleneck like the 4300