If you go for Nvidia like 1660 or the 1660 Ti, any 500-550W PSU from a reputed brand with 80+ gold should be okay. 600-650 for the RX 580 or 590. Seasonic, EVGA, Corsair, FSP, Be Quiet, SIlverstone etc.Going to have ryzen 5 2600x, msi b450 carbon, 16gb ram then just to choose the graphics card and not sure on power supply