Try looking here:
<A HREF="http://www.rojakpot.com/Speed_Demonz/BIOS_Guide/BIOS_Guide_Index.htm" target="_new">http://www.rojakpot.com/Speed_Demonz/BIOS_Guide/BIOS_Guide_Index.htm</A>
It's an <i>excellent</i> guide to everything in the BIOS. it should answer any questions you have.
HTH
<font color=blue><i>Your</i> PC may be quieter, but <i>my</i> PC makes a better hairdryer!</font color=blue>