1. First, the amd graphics card needs to download and install AIDA64 software (or similar software) to modify the bios, restart and cancel the signature.

2. Then open AIDA64 software and select the "Display Device" option in the left menu.

3. Then, in the window on the right, find the device node corresponding to your AMD graphics card.

4. Then right-click the device node and select Edit Settings.

5. Then in the pop-up window, find the BIOS-related options and modify them.

6. Then uncheck the signature-related options such as "Enable digital signature" or "Enable secure startup".

7. Then save the changes and close all windows.

8. Finally, restart the computer for the changes to take effect.