Installed the new BIOS Update [WYLPT10H.86A]
and according to Performance tab help text (and external guides) there should turn up a detailed menu when clicking "cores" or the other, but there is only one option working and that is the "graphics multiplier" setting that defaults to 20. All the other settings are non-interactive. But if written in the search bar at top - for example "mode" lots of these settings turn up and can be adjusted. But that is buggy as well, since for example drop down menus appear below the main menu that drops down from the search...