You're 100% sure there isn't a menu option that would enable some overclocking options? I can't imagine there would be no clock speed options in any BIOS. You read the manual??
I used to have an MSI mobo with the same chipset, and while it was a crap overclocker, the options were all there.
Dunno if this helps http://forums.overclockers.com.au/sh...d.php?t=522957