You will need to contact your graphics card manufacturer for the latest custom UEFI / video BIOS for your graphics card. Flashing a graphics card with an incompatible or untested version can permanently damage your graphics card. Most graphics card related fixes are provided through display driver updates. If you are experiencing issues with your graphics card, then before flashing a new video BIOS update, we recommend downloading and installing the latest drivers for your card.
If you believe you have an issue that requires a newer UEFI / video BIOS, please contact the your graphics card manufacturer.