OS: Windows 10 (an old version)
Cpu: Ryzen 5 2600
Motherboard: ga-ab350-gaming (rev. 1.x)
Old GPU: rx 550
New GPU: rx 580 OC 4gb
Storage: crucial mx500
PSU: corsair cx450 (450 watts)
Maybe it is important to mention the PSU is 450W and it has only one 6 pin connector (a 6+2 connector).
I...