Hello! I bought an AMD RX 580 8gb 2040sp and installed it to my Asrock a320m-hdv R4.0 motherboard which contains a Ryzen 3 3200 G APU.
When I tried to turn on the PC with the Graphics Card already installed it did not give me video, I restarted the PC and disconnected the video card from the power supply, so with my integrated grafics I entered the BIOS (which I have updated to the latest version) to see if my graphic card was detected and yes, it was detected in the BIOS, in fact, according to the BIOS, it gave priority to use the RX 580 instead of my APU.
I restarted the PC again with my RX 580 connected to the power supply and it didn't work again, my RX 580 did not give me video.
So I disconnected the RX 580 from the power supply again and I turned on the PC using my integrated grafics, when the PC was turned on I connected the graphic card to the power supply and I restarted the PC and my RX 580 was showing video already, but it seems it is the only way I can make that the graphic card works, I don´t know why. If anyone can help me I will thank you so much!