is it possible to mod an old PC BIOS

[iAchilles]

Hi Guys,

i've got a rather old PC and with the current BIOS, even using Ctrl+F1 to get into advance option, still u can not do much or overclock ur CPU.

i donno whether it's even possible to mod this bios to enable system to overclock the cpu ( i can already overclock gpu using MSI After Burner)

i attached my PC info.

if u need more info please let me know

thx a lot in advance