Bios cumulative

Consider BIOS upgrades as replacements rather than incremental updates. The process of upgrading the BIOS totally replaces the previous version.

Hope this helps.

I had this same question once, so I called several major motherboard manufacturers(Gigabyte, Intel, ASUS) and asked them. I was informed by each that if a BIOS was missing several updates before the latest version, that all updates would need to beadded in sequential order to asure that all updates and changes were included. This was particularly important to Gigabyte.

Good luck!