If your CPU FID is 04, the CPU multi is 10x
If your NB FID is 07, the NB multi is 12x

If you do not touch any parameter at all from stock but you choose above 9x multi for the NB, your system will downclock everything below stock values. Like this: http://img403.imageshack.us/img403/9...wnclocksr2.png

It tries to keep NB below 2GHz.

Also make sure you have Spread Spectrum and CnQ disabled.