Help Upgrading Computer (What is the weakest link)5

I’ve been in a rut of mainly just playing MOBA games which arent very intensive one my hardware, but I have tried playing modern games such as Overwatch and realised my PC performance is quite poor , so my question is – to keep a relatively steady 60 on games such as Overwatch, what parts of my computer are the weakest – Also if I was to upgrade could you please recommend AMD cpus, even though I’ve been told time and time again intel is mostly superior Specs – CPU – AMD FX 4150 GPU – sus GeForce GTX 770 DirectCU II OC 2GB PCI Express 8GB RAM PSU – Corsair CXM 750w Thanks ^^ Games always take a lot from the gpu, and your gpu is pretty bad. You should get at least a gtx 1060 if you don’t want to play on the higher settings.