How do you can change or upgrade the contents of the CMOS setup chip?

To change or upgrade the contents of the CMOS setup chip, you typically enter the BiOS/UEFI settings during the computer's boot process by pressing a specific key (like F2, DEL, or ESC). Once in the setup, you can modify settings such as system time, boot order, and hardware configurations. To save changes, select the "Save and Exit" option. If an upgrade is needed, it usually involves flashing the BiOS with a new firmware version provided by the motherboard manufacturer.