So I bought a new tower recently and wanted to swap over my rx590 to it. I installed it after swapping over the psu from old tower because new tower didn't have enough pcie cables and for some reason this pc wont recognise my gpu. When I boot the pc it will either spin the fans for a moment then they stop or the fans will spin at a very high speed constantly until I force shut down the pc. The pc never boots at all when doing this either, I will always get no signal. I also tried downloading all new amd drivers before installing the gpu and that did not work. Without the gpu installed the pc runs perfectly fine.
ASUS A320M-K motherboard
Coolermaster 500W psu
Did you change the mobo bios setting to run with the 590, and assume monitor is also connected to the 590 port ?
Asus website will have a motherboard manual, info will be in it.
And do the initial setup with only one monitor connected.
Bios has an advanced mode, look for settings related to graphics. Something along the lines of initial display first/igpu/pci/peg.
I don't have an asus board, it may be better to ask on asus forum for help on bios setup.