AS above, tap your DEL key on boot, this will take you into BIOS, then use your arrow keys on keyboard to move round. Might be under the heading "System performance" But highlight each menu in turn and have a look.
To return to main BIOS menu at any time use the "Esc" key. When finished just hit the escape key and choose, "Exit without saving", confirm by click the Y key and then the "Enter" key. j.