You only need power to the mobo, but it works fine with the CPU installed. Answer from KING_of_Trainers69 on reddit.com
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Reddit
reddit.com โ€บ r/buildapc โ€บ flash bios without a cpu...
r/buildapc on Reddit: Flash BIOS without a CPU...
October 30, 2022 -

I'm gonna flash BIOS using the button on my MSI motherboard. It's my first time building a PC and I get a little bit nervous, so I just want you guys to help me check if the process is correct.

  1. download the bios file, rename it and put it into a FAT32 flash drive

  2. put on power cables onto the motherboard (I think there are 2 cables, one big and one small?)

  3. turn on the power

  4. plug the flash drive into the correct USB port

  5. push the button and wait

  6. until it indicates the completion, I can unplug the drive and turn off the power

Thank you!

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Reddit
reddit.com โ€บ r/pcbuildhelp โ€บ do i need a cpu for a bios flashback?
r/PcBuildHelp on Reddit: Do I need a CPU for a bios flashback?
December 11, 2022 -

The title is self-explanatory. I'm planning on buying a Z690 mobo and I'd like to pair it with a 13600K or a 12700KF. I was recommended to buy a 13600K, but it will mean having to update the bios on the Z690 mobo, which I've never done before, but I watched a video of someone doing it some time ago.

After a quick search on the web, I found an article that says that the bios flashback function does not require a CPU installed for it to update, is that true or should I worry about it?

The mobo I'm looking at is a Z690 Edge ddr4 by MSI, it does have a flash bios USB and button on it

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ASUS
asus.com โ€บ support โ€บ faq โ€บ 1038568
[Motherboard] How to use USB BIOS FlashBackโ„ข? | Official Support | ASUS Global
April 9, 2026 - Q6: After the ASUS 400 series motherboard uses USB BIOS FlashBackโ„ข to update the BIOS, the Intel 11th CPU cannot be used? A6: Please confirm the ME FW version contained in the UEFI BIOS before updating. It must be version 14.1.51.1528 or newer to perform the BIOS update action and use Intel ...
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MS.Codes
ms.codes โ€บ blogs โ€บ computer-hardware โ€บ can-you-use-bios-flashback-with-cpu-installed
Can You Use Bios Flashback With CPU Installed
February 13, 2024 - The process of utilizing BIOS flashback with the CPU installed offers a convenient and efficient solution for updating or recovering the BIOS. By allowing users to update their BIOS without the need for a supported CPU or memory, BIOS flashback ...
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Tom's Hardware Forum
forums.tomshardware.com โ€บ home โ€บ motherboards
Bios FlashBack with CPU Installed? | Tom's Hardware Forum
April 14, 2016 - 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. No, just old and not up on latest tech. Thanks for clarifying... ... Hello...
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Tom's Hardware Forum
forums.tomshardware.com โ€บ home โ€บ motherboards
Question - Should I get a motherboard with a BIOS Flashback button ? | Tom's Hardware Forum
February 11, 2024 - The bios flashback button is a means to flash your bios without having a cpu installed. The main time when this comes into play is when you buy a new gen processor for which there is no support in the bios. Motherboards will include the latest bios available at the time of manufacture so the ...
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XDA Developers
xda-developers.com โ€บ home โ€บ other hardware โ€บ i finally used my motherboard's bios flashback button, and it saved a dead build
I finally used my motherboard's BIOS flashback button, and it saved a dead build
May 6, 2026 - When it comes to buying PC hardware, I'd say it's better to be safe than sorry. BIOS flashback is just one of those features that doesn't seem necessary until you run into serious boot-related problems due to a corrupted BIOS or an unsupported CPU.
Find elsewhere
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Linus Tech Tips
linustechtips.com โ€บ computer hardware โ€บ cpus, motherboards, and memory
Can I flash BIOS with BIOS flashback after the PC is built? - CPUs, Motherboards, and Memory - Linus Tech Tips
December 29, 2023 - Hi, I am building my first PC. I have 13600K and B660-A strix wifi D4 motherboard. I donโ€™t know when to use BIOS flashback. I have seen tutorials doing it without cpu installed, before the pc is built. But I am stressing out because its hard to unplug the ATX cable and I am worried about ...
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Glenn's SQL Server Performance
glennsqlperformance.com โ€บ home โ€บ pc hardware โ€บ intel โ€บ flashing your bios with no cpu installed
Flashing Your BIOS with No CPU Installed - Glenn's SQL Server Performance
February 21, 2022 - Just press the flash BIOS button. Your CPU and case fans will probably turn on while this is happening. Does this method work with no CPU, RAM, video card, or monitor attached? Yes! That is the whole point of this method. Do I need to use this method if I have a Ryzen 3000 Series CPU?
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EaseUS
easeus.com โ€บ backup and recovery โ€บ in-depth guide | how to update bios without cpu๐Ÿ”ฅ
In-depth Guide | How to Update BIOS Without CPU
2 days ago - But only the latest Gen of motherboards allows you to do a BIOS flashback. That means users won't even have a CPU installed in their PC to update the BIOS. But it's vital to understand why you need to update your motherboard BIOS, especially ...
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Overclock.net
overclock.net โ€บ home โ€บ forums โ€บ intel โ€บ intel motherboards
is it safe to bios flash z690 with a 13th gen CPU installed? | Overclock.net
February 22, 2023 - (No need to install CPU and memory.) 4. Plug the USB storage device that contains the MSI.ROM file into the Flash BIOS Port on the rear I/O panel. 5. Press the Flash BIOS Button to flash BIOS, and the LED starts flashing.
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Overclockers UK
forums.overclockers.co.uk โ€บ hardware โ€บ motherboards
How does BIOS flash work without CPU? | Overclockers UK Forums
March 11, 2023 - Some motherboards can even update the BIOS when thereโ€™s no CPU in the socket at all. Such motherboards feature special hardware to enable USB BIOS Flashback, and every manufacturer has a unique procedure to execute USB BIOS Flashback thats from amd site though they dont explain what the special hardware is i guess most people dont care how it works though just that it does
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CGDirector
cgdirector.com โ€บ home โ€บ hardware โ€บ how to update your bios without a cpu
How to update your BIOS without a CPU
November 12, 2022 - You can update the BIOS without a CPU to make your Motherboard ready for newer Processors. Here's how to use the so-called BIOS Flashback Feature.
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Windows 10 Forums
tenforums.com โ€บ general-support โ€บ 211088-bios-flashback-button-important.html
Is BIOS flashback button important? - Windows 10 Help Forums
February 11, 2024 - Is BIOS flashback button important? It can flash BIOS without CPU, GPU and RAM. It is the best feature ever invented. ... When do you need to flash BIOS?
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PCPartPicker
pcpartpicker.com โ€บ forums โ€บ topic โ€บ 471871-q-flash-what-is-it-exactly-do-i-need-to-do-it
Q Flash what is it exactly?? Do I need to do it... - PCPartPicker
Q Flashing or BIOS flashback is a way to update the BIOS of a motherboard without having to needing a CPU installed. It allows you to flash the BIOS without having to get into the BIOS itself. It is especially helpful if you have an older CPU (B450) and a newer CPU (5800x3D).
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Reddit
reddit.com โ€บ r/pcbuild โ€บ first time ever using bios flashback in 26 years building my own rig's
r/PcBuild on Reddit: First Time Ever Using Bios Flashback In 26 Years Building My Own Rig's
November 22, 2024 - That's the entire point of flashback, yes. ... With a USB in the correct port, containing only the BIOS file with the right name in the root directory. Formatted as FAT32. But yes, only the motherboard is needed too, not CPU or RAM.
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Reddit
reddit.com โ€บ r/amd โ€บ can i use msi bios flashback while my pc is fully assembled?
r/Amd on Reddit: Can I use MSI BIOS Flashback while my PC is fully assembled?
March 3, 2021 -

So I fully assembled my new PC, which includes an X570 MAG Tomahawk Wifi and a Ryzen 5 5600X. However, in the event that it does not post, I assume I will have to update the BIOS. The MSI manual says that Flashback can be used "without installing the CPU or RAM." However, since my PC is fully assembled, will anything bad happen (i.e. a bricked motherboard) if I use BIOS Flashback on a fully completed PC?

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PCPartPicker
pcpartpicker.com โ€บ forums โ€บ topic โ€บ 90735-some-boards-let-you-update-the-bios-without-a-correct-cpu
Some boards let you update the bios without a correct cpu - PCPartPicker
June 16, 2015 - And best of all a buyer can do the update themselves without a correct CPU. ... "USB BIOS Flashback offers a hassle-free updating solution for your ultimate convenience. Install a USB storage device containing the BIOS file, press the BIOS Flashback button for about three seconds, and the UEFI ...