How to Update BIOS without CPU?

You may have to update the BIOS on your brand-new computer if you can’t get it to switch on while you’re putting it together.

Even though your CPU is technically compliant with the motherboard, the computer will not POST (Power On Self-Test; this indicates that all the hardware is working correctly) until the BIOS is updated.

Your computer might power on, but the display on your monitor will be completely dark since the motherboard cannot interact with the central processing unit (CPU). So, the query regarding updating BIOs without CPU will solve now.

Table of Contents

What is BIOS Flashback?

In a summarized way, BIOS flashing is a function available on certain motherboards that enable users to update the BIOS even without having a CPU, RAM, or GPU attached to the system.

The BIOS flashback function will  know in a variety of various ways based on the manufacturer, including the following:

Q-Flash Plus is the moniker given to this function on Gigabyte motherboards 

Because ASUS was the first company to coin the term “USB BIOS Flashback,” other motherboard makers do not refer to the feature using the same terminology. It is because ASUS has patented the term.

This feature is a Flash BIOS Button on MSI motherboards software that can locate within the real BIOS itself). The function is referred to by its full name—a BIOS Flashback Button—on motherboards manufactured by ASRock.

If a motherboard supports BIOS flashbacks, you can tell by looking through the product specifications on the manufacturer’s website, where you’ll see one of the terms I’ve already described. Look at the motherboards I have listed that have a BIOS flashback option.

A BIOS flashback feature is beneficial when assembling a new computer because updating the BIOS is sometimes necessary before a computer boots up with a different CPU series. If the motherboard doesn’t have this feature, you’ll need to install a different CPU before you can update the BIOS.

Flashing BIOS without CPU:

Install the BIOS attached document to a freshly FAT32-formatted USB drive on some other pc or laptop, change the file, connect the electricity supply, insert the USB drive into the rear of the motherboard, and click the BIOS Flash Key.

The manufacturer, in the form of video guides or written instructions, typically documents the process of updating the BIOS. But if you’re new to the field, you’re lucky because I’ll break it all down for you right here.

1. Download the Latest BIOS Update File:

If you want to update your motherboard’s BIOS from a different computer, you’ll need to visit the company’s webpage and look up your specific motherboard model. If you look at the

Model number printed on your motherboard; you should be able to get the most recent BIOS update for your model there.

Under “Support” on your motherboard’s page, you’ll find the BIOS. This information may find in the “Drive and Utility” section of certain websites. The most recent BIOS updates are archived in order of their initial public accessibility.

Remember that you should exercise caution before installing and downloading any update labeled “Beta.” To be safe, wait until the launch date is more than a week away. I recommend only downloading updated files if they are less than a week old.

Occasionally, when a beta update is implemented, it breaks some functions. It only applies to the initial BIOS upgrade, which should download.

2. Extract and Rename BIOS Files:

You’ll have to manually change the BIOS file for boards made by Gigabyte, MSI, and AS Rock. In this situation, the BIOS file is the most extensive. Thus, you can tell it apart by looking at its size.

The extracted folder contains the necessary renaming keyword. For your convenience, I have included three different renames for the BIOS files:

  • If you’re using a Gigabyte motherboard, rename the file to gigabyte.bin.
  • Rename the file if you’re using an MSI motherboard.
  • Modify the file name to creative. rom for ASRock motherboards.
  • A warning window warns that the files may become unstable if you rename them. It’s as easy as clicking agrees and saving the file under its new name.

3. Format the USB Drive and Copy the Update Files:

A USB 2.0 memory stick and a computer are all you need to get started.

Insert the USB and select it using the right mouse button in a file manager or under “This PC.” Choose FAT32 as the file format and keep the other options. Just reset the drive now.

The BIOS file has been renamed; please transfer it onto the USB drive. Using the right mouse button, eject the USB disc from your computer. The drive can be removed with little consequence, but there is a risk of malfunction. Thus, it is always a good idea to exercise caution.

4. Setting up The Motherboard:

Connect the primary motherboard connector (24 pins) and the CPU power connector (8 pins) to the power supply before inserting it into an outlet. Although the CPU is not yet installed, you must attach the power connector. Verify that the cables are connected properly before plugging in the power cord and turning on the switch. Flip the switch on the power supply’s rear to start the system.

5. Insert USB and Press the Flash BIOS Button:

The real work may begin now. Flash drives have specialized ports on modern motherboards that must use. Memory, central processing unit, solid-state drive, or graphics processing unit (GPU) installations are not required. Verify that the power cables for the central processing unit and motherboard are plugged into the wall outlet.

USB ports will be located on the back of the device, with one designated for the BIOS.

A little BIOS Flash button should appear near the port; press it now. (This feature is known as Q-Flash Plus on motherboards manufactured by Gigabyte.) The key is only sometimes located on the back of the device; sometimes, it is on the motherboard itself.

If the key does nothing, pressing and holding it for three seconds should activate it.

6. Finishing the Update and Removing the USB:

Simply clicking the Flashing button ought to trigger an automatic update. When the update begins, a blinking or flashing light near the USB port should show you that the process has begun.

Double-check all of the connections if the light doesn’t really blink when you press or hold the button. Verify that the power switch is in the “on” position and that all necessary cables are attached.

While the update is running, do not disconnect any hardware or power down the machine since doing so could cause it to malfunction. After the upgrade is finished, the blinking light will stop. The system can automatically resume or shut down at times. After installing the update, you can securely take out the USB drive.

It’s safe to proceed with hardware installation, and your computer should power up.

What Type of USB Drive Should I Use for BIOS Flashback?

There have been several accounts of PC builders experiencing problems when utilizing a USB 3.0 drive, though this is by no means universal. The BIOS upgrade was successful once the user upgraded to a Standard USB stick.

Since most motherboard makers advise using a USB 2.0 memory stick for flashing BIOS, it’s the best option. Concerning the size of the USB drive, there are no hard and fast rules. The BIOS update file is usually concise. Thus storage capacities of 128 MB to 32 GB storage capacities will suffice (around 10 to 25 megabytes).

Analyzing the material inside the connector may help you determine whether your memory stick is USB 2.0 or USB 3.0.

How to Update BIOS without a Processor?

Updating the BIOS without a processor is not possible as the BIOS is low-level software that runs on the system before the operating system and requires a processor to function. The BIOS is responsible for initializing and testing the hardware components, including the processor before the operating system starts.

To update the BIOS, you need to have a functioning processor in your system. You can follow these steps to update the BIOS:

  1. Identify the model and version of your motherboard
  2. Visit the manufacturer’s website and download the latest BIOS update
  3. Create a bootable USB drive with the BIOS update file
  4. Enter the BIOS setup and change the boot order to boot from the USB drive

Boot from the USB drive and follow the instructions to update the BIOS.

Note: Updating the BIOS can be risky, and if not done correctly, it can cause permanent damage to your system. It’s essential to follow the manufacturer’s instructions carefully and ensure you have a backup of essential data.

How Much Time Does BIOS Flashback Take?

Each motherboard is different. BIOS often upgrades only take a short amount of time. Twenty to thirty minutes is a possible increase. Therefore, it is essential to have patience throughout.

If it takes more than 45 minutes, you should restart the process and double-check that the Standard USB drive was formatted as FAT32 and that renamed the update file appropriately.


It is a widespread issue with the most recent AMD Ryzen 5000 Series processors. It will resolve this problem as time progresses, and new motherboard shipping with the updated BIOS will resolve this problem. 

This post has been the answer to your difficulty. Avoid having to start over by taking care of the first steps. You are welcome to ask me anything else you want to know.

I hope that the users will be no more worried about how to update BIOs without CPU

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