a 150$ CPU outperforms easily the PS4 CPU (i5 3xxx)
a 220$ is on par with PS4 GPU (660 Ti OC 3GB)
a 80 $ 8GB DDR3 + 3GB GDDR5 of the GPU outperforms easily 8GDDR GB RAM of PS4
a 120$ motherboard (i got Asus PZ whatever gen3)
the other stuff you can get dirty cheap or for free
thats less than 600$ and i assure you can play 1080p 50fps every game out there from now to a couple of years







