Underclocking with Bios

[Soow]

Hey im new here and ive been wanting to Underclock for specific reasons but thats not the point. When I boot up my pc I get into setup (which im pretty sure is bios ) but there is none of the settings I need to change.. for example Front End Bus or Core voltage or Frequency voltage my Clock speed whats going on? I bought my cpu built already so.. I dont know if that has something to do with it but this is really bugging me out can anyone help me?
thanks

[timon]

If your not getting any option to under clock your motherboard then you can try with some application specially if you are using amd then there is a good application present from amd i dont remember name now but you will get that on amd site see in fusion section also check this for more Programs to underclock motherboard cpu