I have an EVGA X299 motherboard and I am trying to update the BIOS. The problem is that there are 4 versions of this motherboard with difference part numbers, e.g. 121-SX-E296, 131-SX-E295, etc... I have tried using multiple methods to retrieve the correct part number, including going into the BIOS, but each time it just says EVGA X299 without specifying the part number. Is there a way I can look this up or otherwise determine which of the 4 BIOS updates I want?

Thanks. If it isn't trivial to access the hardware, is there a way to check it online or using some software tool? I seem to recall somebody worked this out once, but my memory no longer serves.
CPU-Z did the same as the others and posted:
 
EVGA Corp.
X299 MICRO 1.1
PCI-Express 3.0
Intel Skylake-X 04
Intel X299 00
Fintek F71889A
 
American Megatrends Inc.
1.28
03/08/2021

By looking right here on the board...
 

Open a command prompt, and paste this in and hit enter. 

      wmic baseboard get product,Manufacturer,version,serialnumber   

 
You can also click "Start" and type "System Information" and click on "System Information". 
This will give all kinds of info. including Bios version.
 
 
 

cotter32

mr_scary
Open a command prompt, and paste this in and hit enter. 

      wmic baseboard get product,Manufacturer,version,serialnumber   

 
You can also click "Start" and type "System Information" and click on "System Information". 
This will give all kinds of info. including Bios version.
  

 

Ohhh, ho, ho ,ho !  Mr_Scary, that is so cool .
 
To the Moon ... in the command prompt module !
 

Thanks. I collect all these bits of commands I find useful, I have a folder full of text files of stuff like this

mr_scary
Open a command prompt, and paste this in and hit enter. 

      wmic baseboard get product,Manufacturer,version,serialnumber   

 
You can also click "Start" and type "System Information" and click on "System Information". 
This will give all kinds of info. including Bios version.
 

 
Quite helpful Mr. Scary. Thank you. :)