Bios FlashBack with CPU Installed?

DanielMikkelsen · Apr 14, 2016

Hi, I have a quick, but important question:

Can I flashback BIOS while my CPU and CPU cooler are connected?

Ironsounds · Apr 14, 2016

Hello... YES... Typically I flash with a CPU in.

reedo_43 · Apr 14, 2016

Is this a joke? You MUST have cpu and cooler installed.

weberdarren97 · Apr 14, 2016

Yes, some BIOS will not flash without the CPU installed because they cannot process to do the flash without the processor. Besides, if your CPU would cause a compatibility problem with the new BIOS, it would likely abort the flash instead of doing the flash and ending up with incompatibility problems.

Snipergod87 · Apr 14, 2016

reedo_43 :

Are you a joke?
Some motherboards have an onboard ARM chip which will allow you to flash the BIOS without a CPU installed. This is done to allow you to install a BIOS update if your board's older BIOS does not support the model CPU installed. Specifically some high end ASUS motherboards have this feature.

DanielMikkelsen · Apr 14, 2016

Oh, my p8z68 deluxe doesn't allow for flashback

I'm having booting problems, so I can't update it in BIOS nor Windows... Damn, have to discard the mobo then.

Anyway, thank you for your answers.

Ironsounds · Apr 14, 2016

Hello... Imagine the Factory production line... mass producing MB's... Wouldn't ya want a method too program, flash all these MB's without inserting a CPU into each and every one? Typically they put a UART chip, serial interface on a lot of these devices to do this.

DanielMikkelsen · Apr 14, 2016

By the way, every youtube video I've watched about this only used mobo + power to mobo socket and cpu socket, so no wonder a newbie will think that it might not be possible.

reedo_43 · Apr 14, 2016

Snipergod87 :

No, just old and not up on latest tech. Thanks for clarifying...

Ironsounds · Apr 14, 2016

Hello... The method and software will differ between these two types of flashes.

hnmusac · May 15, 2017

The instructions in ASUS download page say:
X99-E-WS-USB3.1 Formal BIOS 3502 released.
[Using FlashBack, please rename to "X99EU31.CAP" after download.]
1.Improve System Performance
2.pdate windows update HWID to 9
**Please use “USB BIOS Flashback ” upgrade to BIOS 3502.
-----------Steps----------------
Step1: USB BIOS Flashback update BIOS.
Step2: Clear CMOS.
Step3: Install CPU.
Step4: Start to use.

Step3 specifically says to install CPU after flashback.
I am in doubt if I am *required* to remove CPU before BIOS flashback, and reinstall after it..

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