Building a new mining rig
Specs below:
Amd athlon 3000G
Team DDR4 8GBx1
Asrock B450 Gaming K4
WD Green 120gb m.2 sata ssd
radeon rx580 8gb *4
evga 850w GA power supply

all works fine with 1~3 cards
when I plug in 4th card it doesn't post