Updating video bios
Generally graphics cards do not require BIOS update unless you are facing some serious issues like unstability, freezing, compatibility issues or other technical issues related to GPU.
Also if your graphics card is voltage-locked and you want increase the voltage of the card for overclocking purpose then you have to install a custom or modded BIOS on your graphics card.
If you are not comfortable in performing the steps indicated by your motherboard's manual, please contact your motherboard manufacturer or system assembler for assistance.
The primary function of your system's BIOS is to recognize and initiate all of your system's hardware so it is ready to be used.
"Flashing" the BIOS is synonymous with updating the motherboard's BIOS to the latest version.
The often times requires a floppy drive to be installed on the system.
Everything in our computer has some form of a BIOS/Firmware.