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Hi, it's Mike from Mike's unboxing,

reviews, and how-to. And on today's

video, we're going to take a look at how

to do a BIOS flashback on this

motherboard here. So, this is the Asus

Prime

X870-P Wi-Fi. This is a pretty nice

board, and we've done a review video on

it. So, if you want to check that out,

you're more than welcome to do so. But,

chances are you probably come here

because you just want to know how to

flash the BIOS. It's actually pretty

straightforward, a pretty simple thing

to do. Just make sure that you do things

in the right order, format the right

drives, and all that kind of stuff. But

anyway, we'll get to that as we go

through. So, what are you going to need

to perform the BAS flashback? Well,

you're going to need a couple of things.

Uh, firstly, something to put your

motherboard on. So, ideally onto the box

itself. Now, a lot of people say to me,

Mike, can I do this on a fully built

system? Yes, of course you can. That's

absolutely fine. But for me, for

demonstration purposes and also for

basically simplicity, I do it on a bare

board. The choice is entirely up to you.

Whichever way you want to do it. I think

personally doing it on a bare board is

more kind of proactive because you can

just do the bars flash and if there's

anything that doesn't work, you can rule

out obviously everything else which

would be connected. So if you're doing

it on a fully built system and for some

reason it won't flash, any of the parts

on the computer could be problematic. So

that is the reason why I do it this way,

but you do it however you see fit. So

obviously you need the motherboard

itself. You'll need a USB flash drive.

Now the USB flash drives have to be

formatted in the FAT 32 file system.

Now, for Windows users, you can only do

a 32 GB drive. Potentially, if you're

doing this on another computer, Linux or

Mac, you might be able to do it with a

larger drive. I always recommend a 32 GB

drive or smaller. You can do as small as

maybe a 64 megabyte drive if you want

to, cuz the actual flash itself is about

32 megabytes. So, by the time this is

kind of extracted and formatted and all

that kind of stuff, then that should be

absolutely fine. You'll also need your

PC power supply. You also need two

connectors on the power supply. One of

which is the main 24 pin power connector

and the extra one is the CPU power

connector. Now, you don't always

necessarily have to have that connected,

but hey, most of the time it does need

doing so. So, I always put it on anyway.

So, that goes into the top of the

motherboard, which you're probably

seeing for some B-roll we shot a little

bit earlier. And also, the 24 pin main

power connector is the big one over on

the side. Other things you might want to

do to get yourself kind of accustomed to

the motherboard itself is to look on the

back panel to see where the bars

flashback button is on this particular

board. It's located just here. And make

sure that your button has a nice defined

click to it. If it hasn't, it could be

damaged and therefore you won't be able

to flash your BIOS. Also, look for the

BAS flashback port on this one. It's

nice and easily highlighted and it's the

top one on this row of USBs here right

next to the Wi-Fi 7 antenna. It does say

BS on it. So you shouldn't be able to go

too far wrong. So that's pretty much it

from the hardware point of view. So

let's go over to the computer now and

I'll show you how to download the boss,

how to format the drive and all that

kind of good stuff and rename the files.

You'll find out more as we go through

it. So let's head over to the computer.

Okay, so here we are on our desktop PC.

So I'm going to plug in the flash drive

and you'll see at the moment this one is

empty anyway. Now my suggestion would be

to format the drive anyway just to make

sure. So if you right click on the

drive, choose format and make sure that

all this looks good. So FAT32 is what we

want to see. And also you can set the

default allocation size. Leave the

volume label and leave the quick format

option there. When you're ready, click

on start. Obviously, this is going to

erase the drive. So make sure you've got

no files on there that you actually need

to keep. When you're happy, click on

okay, and it should very quickly format

the drive, giving us a blank drive. So

that is that part of it done. So, we can

now go ahead and close that. The next

part is to actually get the BIOS

itself. So, in order to get the BIOS, go

over to the ASUS website for the Prime

X870-P Wi-Fi. Make sure you get the

version right cuz otherwise you'll be

getting the wrong BIOS. You can do this

however you want to, whichever browser

you choose. I'll leave some links for

this actually in the video description

to make life a little bit easier for

you. So, what I'll do is go over to the

support

tab and then go to drivers and

tools. And in this section, you've got

drivers and tools and BIOS and firmware.

So, we'll go into the BIOS section. Now,

for those of you that are wondering, do

I actually need to do a BIOS update?

Now, if you look on the side of your

motherboard box, it will actually say

when this board was produced. Now, this

particular board was produced sometime

in March of 2025. So, it's actually a

relatively new one. But there are newer

buses. So we can go ahead and get a

newer version. If we click on see all

downloads, you can get a rough idea of

which version is actually on your board.

So our board was manufactured in March.

So it's a pretty likely case that we've

got version 1022 on our board.

Potentially it might be this one 1006

again depending on what was available at

the time of the board actually being

rolled off the production line. So,

there's been a couple of BIOS updates

since that, and I want to go for the

very latest one because of security and

stability, as it says there, improved

system stability and enhanced

reliability. So, that's always a good

thing. And the newest one is actually a

beta version. Whether you want to do a

beta, that's entirely up to you. If not,

you can do the one slightly later. So,

we've got version there

1028. Um, yeah, entirely up to you

whichever you do. Beta versions

generally are fine. So, I'm going to go

ahead and do that one. We'll click on

download and it will ask you where you

want to save it to. I'm just going to go

and save it to the default location

which is the downloads. Alternatively,

if you want to, you can actually choose

your desktop. That might actually be

easier. So, actually, let's do that.

We'll save it to the Windows desktop.

So, click on

save. That should happen very quickly

cuz it's only a very small file. So,

we're done there. So, we can close this

window down. If we go to our Windows

desktop, we have our zipped file. So,

we're going to need to extract that. So

right click and choose extract all and

just go along with the defaults there

and click extract. And we've got some

options here. So this is the bare or

rule BIOS in the cap file. So if you're

doing a BIOS update and you're not using

the BIOS flashback button, i.e. your

system is working and you just want to

update it from within the BIOS itself

using the ASUS system with a working PC,

you can just use this file on its own.

If you are doing it via the USB

flashback method, you have to do the

boss renamer. So double click on the exe

and it will say press any key to

continue. And there we go. So it's now

changed the file name to something that

the motherboard can actually recognize.

This is really important. If you don't

do this, it won't be able to see

it. So at this point now, we can take

this bars file, just this one. We don't

need the exe and right click on it and

we'll choose cut. And then we'll go to

our USB drive, right click and choose

paste. And there we go. That is our cap

file. You should see it's around about

32 megabytes in size. So

32,772 kilobytes. That is absolutely

fine. And that is the only file we want

on the USB drive. So now we can close

this down. We can take out our USB drive

and we can head over to our little test

bench and get this thing flashed. Okay.

Okay, so now we're at our little test

bench setup here. So, we might as well

put our USB drive in. So, again, we know

which port it is. It's one that is

marked BIOS. So, we plug that into

there. And we've got our power supply.

We've got the power plugged into it, but

it's currently switched off. So, we'll

take our 24 pin main power connector

that goes into the connector on the far

side of the board. Hopefully, you're

seeing some overhead shots of this so

you can see it nice and clearly. And

also, we've got our 8 pin EPS connector,

which goes into the top of the

motherboard. Doesn't matter which one of

those two ports you plug it into. Both

of them will do exactly the same job.

So, it's not a problem at all. So, just

make sure that is lined up and plug that

into the top there. They are color coded

in gray. And that is kind of pretty much

it. So, what we want to do now is turn

on the power

supply. And next thing to do, we want to

press the B flashback button. Press in

for about 2 or 3 seconds. Let's just

hold it until the bars LED starts

flashing. So, let's do that now. So,

one, two,

3. And hopefully there you can just

about see the lighting is not

particularly great here, but you can

just about see that the boss LED is

flashing. If you look through the side

of the motherboard as well, you can see

it's actually reflecting on the back.

So, what we're waiting for now is for

the USB to completely go out. That means

the boss flash is done. So, let's give

you a closeup so you can see what that

looks

like. So, again, as we've said

previously, just let it go on, do its

own thing. This should take somewhere in

the region of about four or 5 minutes.

So, if you want to set something of a

timer or look at your watch to see what

the time is, and just keep an eye on the

LED flashing. If the LED flashes just

for a couple of flashes, then turns off,

that means either the USB drive you're

using is not formatted correctly or the

file you've downloaded is in an

incorrect format. Again, at some point

you should see that the bars LED will

change speeds. So, normally it will

flash a little bit slower to begin with.

Then, when it's actually getting into

the flashing process, it will go a

little bit quicker and then generally

will see it slow down towards the end.

Then, the system will probably click off

and you may hear your power supply click

off and then it possibly will try and

reboot itself as if it's basically

powered on for the first time. But

essentially what we're looking for is

for this BIOS LED to stop flashing and

completely turn itself off. Once it's

done that, we'll be able to turn off the

power and disconnect everything should

we need to. Or alternatively, if you

have a fully built system, you may find

you we can now turn on your PC and it

will actually boot

up. Again, I can't stress this enough.

Just leave the computer alone. Let it do

its own thing. Be patient. Again, if it

goes on for more than about 5 to 10

minutes and it doesn't change speeds in

terms of the LED flashing, something has

gone wrong and then you can turn off the

system and start

over. So hopefully I think I've just

caught that. So the bars LED has now

stopped. Looks like the computer has

turned itself

off. So that is it. The bars has been

flashed. So at this point now you can

remove your USB drive because the LED

has gone out and also you can turn off

your power

supply. So again as we said previously

it's all done now. So USB drive has been

removed. You can turn off your power

supply if you've got it in a bare setup

like this. And now if you want to you

can put on your RAM, put on your CPU and

a cooler. Maybe do a test boot to make

sure that everything works. Again, if

you've got your system fully built, then

you should find now just turn the PC on

and it should all work as normal.

Unfortunately, due to some of the cost

cutbacks on this particular board, there

isn't a diagnostic LED. So, potentially,

if you've done this and your system is

still not booting, you might want to

look at getting a small BIOS bleep

speaker, which can be plugged into the

motherboard. That way, then you can

listen out for any kind of telltale

bleeps, which may give away the problem

with your system. Unfortunately, other

than that, yeah, you're pretty much on

your own. But if that does happen to

you, feel free to reach out to us on our

Discord and someone will try and help

you. Maybe even myself, depending what

time of day it is. And again, as always,

if you got any comments or questions,

feel free to let us know in that comment

section below. We'll try and answer

every single one of them. I think that's

going to pretty much wrap this video up.

Hopefully, you've enjoyed it. If you

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content of interest. So I think that's

going to wrap this one up. I've been

Mike. This is Mike's unboxing reviews

and how two and hopefully we'll catch

you in the very next video. Thanks for

watching.

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