topic Re: BIOS UPDATE - B550A4-EM in Operating Systems

BIOS UPDATE - B550A4-EM

Kiraa — Sun, 22 Feb 2026 15:22:56 GMT

Hello everyone,

I am seeking assistance to update the BIOS on my MEDION system. Below are all the important details about my hardware and current BIOS version to help identify the correct update:

- BIOS Version and Date: 550A4WOX.105 (11/13/2019)
- BaseBoard Manufacturer: MEDION
- BaseBoard Model Number: B550A4-EM
- BaseBoard Version Number: 1.0
- MSN: 20067068 i think

Re: BIOS UPDATE - B550A4-EM

daddle — Sun, 22 Feb 2026 16:16:12 GMT

@Kiraa

Hi Kiraa your given MSN is wrong. You should tell us the MD .number as well. The MSN of your PC usually is on a sticker underneath the bottom of the case.

Or just execute msinfo32.exe (Win Tab + R), and in the Line System-SKU on the first page the last 8 digits are usually the MSN number of your PC.

Where from did you get the MSN 20067068? This is normally the Board V. 3.00? Did you read it from the white small sticker on the board, mostly next to the RAM modules?

Look here:

https://community.medion.com/t5/FAQs/FAQ-Specifications-Mainboard-quot-ECS-B550A4-EM-3X00-quot/ta-p/98911

Bye, daddle

Re: BIOS UPDATE - B550A4-EM

Kiraa — Sun, 22 Feb 2026 21:56:31 GMT

yea sorry i looked at the white note next to the RAM, The MSN is: 10023416

Re: BIOS UPDATE - B550A4-EM

daddle — Mon, 23 Feb 2026 10:22:51 GMT

@Kiraa @Major_ToM

We have to ask a Moderator, eg @Major_ToM , if there is a newer Bios for the mainboard ECS B550A4-EM 3X00 MSN 20067068 than the installed Bios version:

--> 550A4WOX.105 (11/13/2019).

Hi Major I get a bit mixed up, because on the board it says BaseBoard Version Number: 1.0

Now there are a B550A4-EM, B550A4-EM 2X00 and B550A4-EM 3X00.

Which Bios for which board?

I have for instance a B550A4-EM 2X00 MSN 20066891 with the Bios Version W0X 1.04. ROM date 16.10.2019

You gave me then to update the link for "00_Bios_550a4-em_v1_108.zip" , ROM date 05.02.2021 which I did not install because of the irritating naming.

There also is a Bios "00_Bios_550a4-em_v2.zip" with the ROM 550A4W0X.214

ROM date 31.08.2021.

Which Bios is the correct one for the PC E32006 (MD 34260) MSN 10023416 with the the board MSN 20067068?

Thanks for helping out

Bye, daddle