Precision 7670 BIOS downgrade

This is BIOS firmware version 1.16  Precision_7X70_1.16.0.exe

This is other available versions:

@Chino de Oro​ 

 Could you send me a link to:

Precision 7x70 Bridge-BIOS downgrade.exe

Traditional installation does not work cause of secured BIOS restriction update.

There is no BIOSdowngrade.exe file.  To perform a downgrade, just download and put the BIOS firmware from my post onto a FAT32 formatted USB drive.  Boot the system and immediately tapping F2 for BIOS settings menu.  Verify that the option Allow BIOS downgrade is Enable.  Then exit and immediately tapping F12 for a one time boot menu.  Select BIOS Flash Update in the Other Options section to start the process of updating BIOS outside of operating system.

There is a BIOS recovery process whereas you can flash the BIOS firmware using recovery image on the boot drive or with a USB drive.  Although, going back and forth between BIOS versions, you may create issue with mismatch Intel ME firmware or worse, bricked the motherboard unnecessarily.

Not all BIOS versions allow downgrade like in this case.

Here is my experience about the BIOS downgrade process.

Precision_7x70_Bridge-BIOS_downgrade.exe will activate the Bridge mode version 98.18.0.
After restart device may hang to Dell Security BIOS start logo.
Wait five minutes. If still stuck, power off, open the bottom cover and disconnect battery cable.
Wait a while and connect the cable back. Now the device will restart.

Last step is to install normal BIOS 1.16.0 update. This will do the real BIOS downgrade to version 1.16.0.
After successful BIOS update device may still hang to Dell logo start screen. Power off and try again.
Finally, the Windows will start, and System Information will show BIOS Version Dell Inc. 1.16.0, 15 Sep 2023. 

Contact your local Dell support. They will provide you the exe file.

New Dell Precision 7670 and 7770 System BIOS version 1.20.1 is finally out. Release date 16 Apr 2024.

You can download it from here:

https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=pt1rt&oscode=wt64a&productcode=precision-16-7670-laptop

Now you can forget downgrade problems. I have been using the new version for four hours.

@heikkuri Bonjour, avec la version 1.20.1, les performances générales sont-elles dégradées comme c'était le cas avec la version 1.18 ? Et le logo Dell au démarrage c'est toujours DELL ou DELL security comme avec la version 1.18 ? Merci d'avance

@Chino de Oro Bonjour, avec la version 1.20.1, les performances générales sont-elles dégradées comme c'était le cas avec la version 1.18 ? Et le logo Dell au démarrage c'est toujours DELL ou DELL security comme avec la version 1.18 ? Merci d'avance

The new BIOS version 1.20.1 addresses the Dell Securities Advisories (DSA) and fixed system lag during playing games. 

Fixes & Enhancements

@Chino de Oro Et avec la version 1.20.1, les performances générales sont-elles dégradées comme c'était le cas avec la version 1.18 ? Et le logo Dell au démarrage c'est toujours DELL ou DELL security comme avec la version 1.18 ? Merci d'avance

Bonjour, avec la version 1.20.1, les performances générales sont-elles dégradées comme c'était le cas avec la version 1.18 ? Et le logo Dell au démarrage c'est toujours DELL ou DELL security comme avec la version 1.18 ? Merci d'avance

Have not seen any widespread reports of performance degradation from new BIOS update.  Maybe yours is just isolate case.  If the system is still under warranty, click on Get Help Now to get support from Dell.

For home use environment, you should wait for two cycles of BIOS release before update your system.  That would help to avoid a bad release but also keeping your system update with security patches.

@Chino de Oro Sorry but I was not a single case with bios version 1.18.0. Everybody was affected wit this bios version. The general performances were badly degradated and it was a disaster. We were obliged to come back to bios version 1.16 in order to solve the problem. So, this is why I ask if the someone has tried bios version 1.20.1 in order to know if this new version is ok or not ?

Usually, no news is good news.  Wait for 2 more months and if the BIOS firmware 1.20.1 is still available for update, then you can use it.  If it gets pulled, your system would not affected by it.

Dell will be releasing new BIOS firmware update every month.  You would not want to ask the same question every month.  Refraining from updating new release BIOS may help you from going this issue again.

@Chino de Oro Sorry but it's not normal to act like this way furthermore with professionals computers ! It's not at the customer to wait, check, test and take care if the bios manufacturer updates work without problem !!! It's at the computer maker to make tests and checks before to deliver the bios update to the customer  !!!!

Re:   It's not at the customer to wait, check, test and take care if the bios manufacturer updates work without problem !!! 

Exactly, there is no need to check to see how each update will work.  You can either update it or you don't.