My operating system:
Win 10 x64
GPU: AMD 480 8gb as in this picture

video driver: Adrenalin 2020 ver. 20.4.2
Miner: lolMiner 1.6
without making any changes "lolMiner 1.6" gives me 22.23 MH/s on ETH.
All right for this GPU? Or can I do something to get better performance?You need to modify the bios with software like this
https://www.techpowerup.com/download/ati-atiflash/Search for a valid mining bios which is compatible with your GPU.
It is a bit tricky and boring... But if you have only one GPU, it worths it.