bios rollback not supported

ac13044 · Jan 15, 2017

looking to downgrade bios to [strike]1[/strike] the one before the latest to fix monitor issues. Plus i want to overclock my i5 6500 i know to tweak settings core volt disable some things i think

better if someone out there knows please guide me, thanks also cannot roll back bios asus pro gaming z170 bios says this is not a proper bios. stuck at this.

pc specs
asus pro gaming z170
Be quiet dark rock pro 3
i5 6500
8gb ram
geforce gtx 750ti
evga supernova g2 650w

Multipack · Jan 15, 2017

How are you trying to do it? Via USB? Did you unzip the BIOS file first, put it in the root directory and format the USB drive as FAT 16/32?

ac13044 · Jan 15, 2017

yea usb i am doing it from. i have upzipped it not a newbie to bios updating etc. formatted the usb to fat32 still nothing

Multipack · Jan 15, 2017

Ok so am also assuming the USB drive only has one partition on.

What method did you try? EZ Flash? Have you tried the DOS method?

There's no reason it wouldnt work, and is a fairly simple process. Have you tried using a USB 2.0 port?

ac13044 · Jan 15, 2017

yea quick format to fat32 used ez flash utility have not tried dos yet do not know how il try usb 2.0 it worked when using usb to flash to latest bios regret doing

Multipack · Jan 15, 2017

Instructions for using the DOS method here.. http://dlcdnet.asus.com/pub/ASUS/mb/LGA1151/Z170-PRO-GAMING/E10719_Z170_PRO_GAMING_UM_V2_WEB.pdf?_ga=1.120161103.636118347.1475534542

Also, I think you can restore the original BIOS with that board using Crash Free BIOS feature.

Am still not sure why it doesn't think the BIOS file you are trying to use is not a proper BIOS file tho. Rolling back is the same as updating, as the board doesn't know what BIOS version it has.

ac13044 · Jan 15, 2017

asno i have tried it in a usb 2.0. no luck i can update to the latest bios i have checked there anything under the latest i cannot load as same error occurs selected file is not a proper bios

Multipack · Jan 15, 2017

Is teh BIOS file named Z17PG.CAP? Have you tried pressing F8 to enter boot menu then booting the USB that way?

Are you using the same USB drive to successfully update BIOS? Doesnt seem a logical reason for it failing.

ac13044 · Jan 15, 2017

i have tested 2 usbs both same output. the 1 i am using now i can flash to latest formatted to fat32 have multiple bios file. latest works the rest do not. same error the selected file is not a proper bios

current mobo is asus pro gaming z170. bio latest is 3016 looking to go before this

bios version: >> Z170-PRO-GAMING-ASUS-2003.CAP

Multipack · Jan 15, 2017

If you have the original DVD just try this https://www.asus.com/support/faq/1012219

or this https://www.asus.com/support/FAQ/1008280/

ac13044 · Jan 15, 2017

To recover the BIOS:

Step 1: Turn on the system.

Step 2: Insert the motherboard support DVD to the optical drive, or the USB flash drive containing the BIOS file to the USB port.

Step 3: The utility automatically checks the devices for the BIOS file. When found, the utility reads the BIOS file and enters ASUS EZ Flash 2 automatically.

what next i have support cd on usb what to do next the bios file in support cd says same thing not a proper bio. how to do the crash free guide is not specfic even MB Updater Utility is hard to do

Multipack · Jan 15, 2017

Crash Free BIOS should automatically run when it detects a BIOS file. If not, can you get into your BIOS? You could try using the EZ Flash, but if the one on the DVD is saying not supported then ASUS may have blocked BIOS downgrades somehow. It shouldn't be this complicated, so am wondering if your board wont let you change to a lower version.

Have you tried clearing CMOS first?

ac13044 · Jan 15, 2017

crashfree bios how to know when im in crash free. i can get into bio on usb latest i can upgrade others i cannot. iv tried ez flash same result. i think asus have blocked downgrading. currently waiting on support to answr back email i sentyeah cleared cmos

ac13044 · Jan 15, 2017

how to enter crashfree bios or even freedos bios using links are really helpful

Multipack · Jan 15, 2017

The links above show you how to do it. Another one http://www.asus.com/support/FAQ/1012154

See what ASUS say first. They will know the limitations of the board.

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