I upgraded my gpu to an rx590 today and have been having some issues. I feel like I installed everything correctly, and my drivers are up to date. However, I get terrible FPS when playing games. My brother built a pc with the same specs this past week and is getting constantly around 100 FPS and above.
Specs
Ryzen 5 3600
Rx590 8gb
16g ddr4 ram
msi x570 motherboard
650w power supply