Question about ASUS M2N-MX Motherboard

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BIOS 1004 cpu not support

I flashed the bios with the latest bios v1004 from the dl section of the asus site but during post the error "cpu not support comes up" and cannot flash to a lower version as the current bios prevents this.i reflashed with the same version to no it possible this bios is not intended for this motherbord  as the file name is
cpu: amd athlon x2 6000+

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  • de_assassin Apr 17, 2008

    its just the plain M2N-MX. thats why i find it strange i'm having this problem.

  • de_assassin Apr 19, 2008

    according to the asus site my cpu is only supported from v806 up.
    i was on 406 or 411.i'm currently stuck on v1004.

  • de_assassin Apr 20, 2008

    how would i go about killing it? 

  • Anonymous Jul 16, 2008

    having same problem i installed 6gig cpu i had old version bios computer booted but said needed driver for cpu. so i put latest bios 1004 now says cpu not support shutdown in 15 sec.only thing is board supports 89w and new 6g x2 is 125w i wonder if thats the issue



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I got it :-)

Damn Asus , it was a hard session ;-)

1. Make an ISO from your original Asus CD denn insert (with isobuster or something) the Bios Firmware 1004 in the main Dir name the file M2N-MX.ROM

2.Burn a Second disc with the 0804 Bios ROM also rename the 0804 Rom to M2N-MX.ROM

3. Go to EZ FLASH with ALT + F2 and then insert the 1004 CD wait till Erasing is ready Then Turn OFF your PC :-) so you crashed the bios thats what you need to run the embeded CrashFRee Tool

4 After you turn your PC on insert the 0804 CD then it flashes the this Rom and we are Happy :-)

mfg Eddi Hope this helps someone

Posted on Oct 16, 2008

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1. How to flash original bios from motherboard cd
put original drivers cd into, restart hold "Alt Gr" and "F2"
to start EZ-flash utility on board then it will load auto the cd
and will instal original bios rom from motherboard driver cd named M2N-MX.ROM

2. Downgrade, upgrade bios install Asus Update utility for win7
( for xp instal xp version from motherboard cd) stick to options downgrade, or not if upgrade and flow the installation work for downgrade !!!

3. Upgrade AFUDOS Upgrade only, sing AFUDOS, use rw cd/dvd using nero burning rom utility create boot cd or dvd and drag fowder bios containing files AFUDOS and M2N number.ROM then burn the cd. Restart and boot from cd starting msdos comand: (F:\ ) pres enter, (cd bios) enter, (dir) enter to see the files, to flash (afudos /iM2Nnumber.ROM) for more info see youtube videos

4. How to downgrade from protected from last bios M2NMX1004 is protected from downgrade, you already have installed the protected rom, burn boot cd or dvd from part 3 on my exponential with the same rom and reinstall the same rom but when you see erase and rewrite start cut the power from cable or back power button then you will corrupt the bios and using original board driver cd into start and press Alt GR and F2 to start EZ-flash utility on board, then it will load auto the cd and will install original bios rom from motherboard driver cd named M2N-MX.ROM

5.After that use new Asus Update utility for win7 from is compitable witw win7 to downgrade, upgrade bios my DualCore AMD Athlon 64 X2, 2900 MHz 5600+ work ferfec with version bios M2N-MX0302, all other version have usb problem with linux storage no usb 2.0 detected cannot transfer faster !
Bay the way part me for my bad english i decide to post my experience to help to other, like other post help me many times ...
Than You and good look!
Update utility
bios roms M2N-MX

Posted on Aug 14, 2014

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I am having the same problem. I have a AMD 6 gig and flashed my bios to ver 1004. I can not get to a post to select boot from CD and get the CMOS checksum bad for CPU supported. Unable to get to a F12 to select boot option to try and use the flash utility? Any Ideas?

Posted on Nov 08, 2008

Guest:de_assassin. login info was on the other pc

Posted on Apr 22, 2008

Thanks for the help..decided it was easyer just to get a new bord. needed to upgrade anyway :D. got the gigabyte ga-m57sli-s4

Posted on Apr 22, 2008

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If your board is the plain jane M2N-MX it is the correct one, however if you have the MX SE or SE Plus then the bios is incorrect and as 1004 prevents going back to a different bios version your chances of flashing back is at 50-50.

Posted on Apr 16, 2008

  • Mark Williams
    Mark Williams Apr 18, 2008

    I've had this happen once to me on an asus board. They require the flash utility before the flash .bin is installed Then after the flash I had to put in the new cpu. Check the bios versions and see what processors are supported.

  • Mark Williams
    Mark Williams Apr 19, 2008

    Asus link
    bios 1004 supports Athlon X2 4850e
    because the bios prevents downgrading I would suggest either get this processor or try to kill the bios.

    you better have the bios flash utility and Bios 804 before attempting.


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