What is graphic BIOS and how to identify graphic BIOS ID ?

Graphics Card Video BIOS (VBIOS) provide the basic operating code for powerup initialization of the card. Graphic Card BIOS ID is visible in Windows by running suitable application utilities such as FireStorm and GPU-Z, in the form of a set of 10-digit numbers. VBIOS ID numbers help to keep track of the VBIOS, but are NOT an exact way to identify the VBIOS version. Normally, VBIOS do not need regular change at the end user level.