Can't change LDTMulti in bios?

[Willeh]

I had a good look through bios and found I can't change the ldt multi, is there a program or anything I can change ldt multi in windows or any program that can say what my ldt multi is set at.

EDIT: Here's a link to my mobo : http://www.foxconnchannel.com/EN-GB/Product/motherboard_detail.aspx?id=en-tt0000020

Thanks