As you may know, PCI/AGP and PCI-Express video cards use their own BIOS apart from the mainboard’s BIOS to enable their capabilities. A lesser known fact is that motherboards which use integrated VGA chipsets also have a video BIOS, but here it is stored inside the main motherboards BIOS as a module.
As on every vga card updated video bioses may help with resolving display problems. A famous example is the missing WXGA display resolution on some integrated SIS chipsets.
This How to (written by cp) will replace the integrated chipset’s video BIOS in your mainboard BIOS with a newer version. Check the link to read more!