Biostar A780L3C support CPU Athlom II x4 640

[kohonez]

Good morning, I would like to please ask if it is possible for someone to help me with the modification of the BIOS for the motherboard to Biostar A780L3C, the Athlom II x4 640 does not appear in the list of processors and I would like to know if it is possible to add it to the BIOS so that it is accepted since I have one, I looked and identical processors appear as compatible in general characteristics with the difference in speed, if someone can help me I would really appreciate it please.