When I got my MB it originally had version 1.40 installed. It goes all the way up to 1.70. My question is do i have to install all of the bios' one at a time until i reach 1.70 or can I just download 1.70 and it will have all of the previous bios updates inside of it.
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A BIOS file always is complete. You only need to download version 1.70.