Current Driver
Its best to get your drivers right from amd at https://www.amd.com/en/support .
Previous Drivers
If you are looking for older drivers, here are some releases, be sure to check the product compatibility at the bottom of the page:
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-20-4-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-20-3-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-20-2-2
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-20-1-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-19-12-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-19-5-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-18-12-1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-17-7-1 (This is one of the last windows 8.1 driver released)