First thing what is your PC information: :Motherboard, CPU, GPU Make & Model & Windows and both AMD Driver versions.
I really can't see the connection between a Graphics driver and Wifi unless the Graphic driver has some sort of conflict with the Ralink driver.
It would sound more of a Motherboard Wifi Ralink Driver or Windows issue but since you can verify that by installing the latest AMD Driver does stop your WiFi from working and by installing the previous AMD driver the WiFi works normally.
First when you have the latest AMD driver installed does Device Manager show any errors? If so which ones? (Helps to identify driver issues).
What does Device Manager show with the previous AMD Driver installed? Any errors if so which ones? (Helps to identify driver issues).
Does your Motherboard have Wifi driver to download? what version is it and for which version of Windows? (Checks to see if Motherboard drivers has issues)
Run this simple command line to check your Windows OS: SFC /scannow (Checks if Windows is corrupted)
Also run Windows Network Troubleshoot tool in Windows Settings when the Wifi is not working after installing the latest AMD Driver (Allow Windows to find conflict with Graphics driver if possible).
I suggest your open a AMD SUPPORT Ticket to let them know that the latest AMD driver is affecting your Wifi driver from working from here: https://www.amd.com/en/forms/contact-us/support.html (Have AMD verify issue if possible).
Also open a Support ticket with the Manufacturer of your Motherboard to let them know a Graphic driver is affecting their Wifi from working. (Notify Manufacturer of possible issue with their Wifi chip driver and Graphics driver).