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This option (Full Speed) is not available on the G4520G6 system. The only thing you can do is set the BIOS to run in Acoustic Mode or Performance Mode.

BIOS FSC controls fan algorithm setting

The only difference between Acoustic Mode and Performance Mode is the SYS Air Inlet fan startup setting. Please refer to the table below for details:

SYS Air Inlet temperature and Fan PWM table for Acoustic vs Performance mode

Note:

  • Performance: Prioritizes cooling (lower temperature, faster fan speed, louder noise).
  • Acoustic: Prioritizes quietness (slower fan speed, slightly higher temperature, quieter noise).
  • “SYS Air Inlet” refers to the temperature (°C) at which the fan PWM changes.
  • In Performance Mode, the fan starts at higher speeds at the same temperature, improving cooling performance.

If you have any further questions, please open a ticket for more information.