T400 w/ Vista 64bit can't clock down? or CPU-Z is wrong?

Just got my T400 last friday and formatted to Vista Ultimate 64bit w/ SP1 the first day. Pretty sure I have all the drivers and power manager 2.42 seems to be working and I can idle at ~10 watts with integrated enabled.

However, according to cpu-z 1.50 it seems like my cpu (P8400) only runs at full speed (2.26ghz) and a lower speed (1.6ghz) with a 6x multiplier. But my FSB does not ever change, and I can't find an option to enable super low frequency mode to drop the fsb down to 533mhz for a resulting 800mhz cpu. I have tried setting the bios to 'automatic' or 'maximize battery' when on battery, have tried to upgrade to bios 2.03. Maybe cpu-z isn't detecting my speed properly? I thought there should be a few more p-states. Has anyone gotten this to work? Thank you!! This laptop is already so much better than the HP tablet I had and made HP buy back.

 

Hit F9. Its a CPU-z bug that doesn't show the low power mode unlet you hit F9 in CPU-z

 

Thank you!, just tried that but it is a bit weird, from the CPU-Z website it says F9 changes the method CPU-Z calculates the cpu speed. So after hitting F9 I get:


Max performance:
743mhz with multiplier greyed out , compared w/ 2.26ghz
Stock FSB 1066

Max Battery
254mhz , compared w/ 1.6ghz
Stock FSB

I thought the FSB should change when Superlfm is enabled since I thought the lowest allowed multiplier was 6x.

Any ideas?

 

Think I solved my issue , downloaded intel processor ID utility and it correctly showed a lower FSB and 800mhz while on max battery. Now if there is only a way to specify which p-states are allowed in power manager....