[SOLVED] GTA V low fps after upgrade gpu

[Anthonyds]

My computer is Xeon X5680 with 16GB Memory Ram and origin GeForce GTX 770 2GB on GTA V was setting med/high 1080p very smoothing. now I upgraded new Radeon RX 580 8GB then play GTA V very slow 18-33 fps I don't know why I can't find search answer. I saw some youtube show RX 580 very smoothing with Ultra setting. I need help solve it

 

[NightHawkRMX]

Use display driver uninstaller and reinstall new drivers. A new os install may be needed.