Using the standard BIOS ID number or free utilities to identify a motherboard in order to be able to upgrade its standard BIOS
If you upgrade the standard BIOS for particular make/model of motherboard, if there is no automatic update procedure or if you can’t get it to work, you have to identify the BIOS so that you upgrade that BIOS with the update written to update it. If you use an update designed for another make/model of motherboard, the computer can be rendered unbootable.
Every Award and AMI BIOS, for example, has a unique ID number, a string of numbers and letters that usually appears briefly at the bottom left-hand side of the standard screen at start-up (that is not the motherboard manufacturer’s logo screen). If the first screen displays the manufacturer’s logo, you have to enter the BIOS to enable the setting that displays the standard startup screen. To make a note of the number, use the Pause key to freeze the screen. Wim’s BIOS site provides the information on how to decode BIOS ID numbers.
Luckily, there are several excellent free utilities that you can download and run that identify a computer’s hardware and software, including the BIOS ID number, such as the free Belarc Advisor. Once you have identified the BIOS, you can visit the motherboard manufacturer’s website
Updating the BIOS of a video/graphics card
All video/graphics cards – using a PCI, AGP and PCI Express motherboard slots – have a BIOS setup program that accesses a BIOS chip on the card in the same way as the system’s BIOS setup program accesses the BIOS chip built into a computer’s motherboard.
At start-up, the main system BIOS detects the video BIOS and adds it to its start-up routine. If you observe the start-up screen, you might be able to see the video card being acknowledged by the system BIOS in the same way as it acknowledges the disk drive(s).
Updates for the BIOS file can be made available for both the motherboard’s system BIOS and the video card’s BIOS from the motherboard manufacturer’s and the video card manufacturer’s sites respectively. Instructions on how to update the BIOS are usually also supplied. Often new features can be added by updating a video card’s BIOS, because the manufacturer often uses the same video chip on high-end and low-end cards, and it’s the BIOS that limits the low-end card. If that is the case, doing nothing more than updating the BIOS can make a low-end card function like its high-end relative. Updating a video card’s BIOS can also sometimes solve problems that are otherwise insolvable. But note that you cannot access the settings of the BIOS of a video card as you can access the settings of the motherboard’s system BIOS by pressing the entry key(s) at start-up to run the BIOS setup program. The methods of updating a system and graphics-card BIOS are the same – usually using a tool installed on a USB flash drive to install the update.
Advanced Guide: Flashing a Video Card BIOS –
How to update graphic card bios ? AMD – Asus  –