Look for a printed model number between the PCI slots or near the RAM.

Aptio V is one code, multi-architecture ready. Aptio V BIOS/UEFI firmware is intelligent BIOS for intelligent platforms. www.ami.com Ami Aptio Dt 2006 Mainboard Verified

You might ask, why verify a board from 2006?

AMI Aptio firmware volumes often contain a section with manifest hashes. Using UEFITool , you can extract the DXE driver responsible for verification (often named SecMain , PeiCore , or VerificationDXE ) and examine the hash algorithm (SHA-1 or MD5 typical for 2006).