So make sure BIOS Recovery is also enabled in BIOS setup on your PC and be sure to reboot so the recovery file should be stored on the boot drive, before running any upgrade/downgrade.ģ. There's always a risk a BIOS update (downgrade) fails which could brick the motherboard. Security updates, fixes and improvements included in all versions of BIOS that are newer than the downgrade version will be removed.Ģ. Then follow the instructions for: Updating the BIOS from BIOS Boot Menu (independent of operating system) posted on the BIOS support page which also has links to older versions. ġ. You'd have to enable that option in BIOS setup and then reboot.

No submissions about memes, jokes, meta, or hypothetical / dream builds.If you actually have a CPU (i7 or i9) that can run RAM at 2933 MHz (maximum), and you blame the BIOS update for the slower speed you're seeing (which is doubtful), BIOS setup on the XPS 8940 has option to allow BIOS to be downgraded (flashing the system firmware to a previous revision).

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