Bios Asus rampage II Extreme

Hello everyone !!


i'm new here, i just discovred this forum.

so i need your help, this is my problem:

i have a Xeon x5570 Engineering sample
with Asus rampage II extreme motherboard
but my CPU Ratio is still locked between 12 and 24
can someone explain to me how i can unlock the ratio ? or mod my bios ?
because with my ES version i think i can choose an higher cpu ratio..

thank you very much