how can i upgrade video bios of my graphics card?there is such thing?
There is such a thing but it is not done often. The only reason to upgrade the video BIOS is if the card maker find an issue in the version shipped and needed to correct it. The card maker will provide the new BIOS and method to upgrade it if needed.
If there is a VBIOS update it will be issued by the manufacturer of your card.
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