Question Predator g320 rx570

[rebarkurd]

Hi, is a rx570 4b good combinet with acer predator g3620 GPU
my cpu Intel Core i5-3470, 3500 MHz
my psu ps-6451-5AE
my currently GPU is the Gt 645
will the rx570 4b fit my pc without no problem or i should take gtx 1060 3gb ovetit
which is better??
Thanks for the helps....

 

[rebarkurd]

anybody??