This setting --avalon8-voltage-level-offset has no effect on mining speed so I set --avalon8-voltage-level +3 with results and it loos like +5 is the default setting.
I'm not sure you are seeing what you think you are... the value range that the controller works with is -2 to +1, a +3 or +5 will return an error and either default to 0 or not start.With a setting of --avalon8-voltage-level +6 and it does work, I set it back to +2 after that screenshot so it will run cool, so the setting absolutly does work
Moderator's note: This post was edited by frodocooper to reduce the size of the embedded images.