The Cohhilition

Hey guy's and thank for your time . I want to upgrade my pc a bit but i'm not really sure what i should change or what would still be good for a while i do understand most have intel but i have amd yes yes i know i know but still i want a bit of help on what i can change to have more fps, here is what's inside my Potato:

CPU: AMD FX-8350 Eight-Core
MB: Gigabyte 970a-UD3p
Graphic Card: AMD Radeon R9 270x CU2
Memory: 16GB

Maybe i should change my Graphic Card? or get a full new pc? i'm not good at this stuff and it's my first gaming Potato

PS: sorry for my bad English.

Upgrading is only a good idea if the PC isn't too old or/and mainly if the PSU of a decent quality. So how old is it, and what PSU is it?

My PC is about 2 year's old and for PSU i have a Cooler Master B700 ver.2

The PSU is not too bad and still has a year of warranty left, you could get away with just an upgrade to the GPU(RX580?) for now but i suggest that for the long run you look for a better PSU or just replace everything.