Battlefield 2 reduces my cpu speed

Hi, i installed the battlefield 2 demo some months ago and since I was able to play it on full specs on my notebok i bought the full game. Now here's the kicker:

When playing i get either ok framerates or the worst lag ever (this more often than ok frames), that almost prevents me from exiting the game, both in single and multiplayer....

I scanned my systemspecs and discovered that my 1,86 ghz cpu was reduced to 760 mhz.

Here's a few samples:
This is what it should look like...


This is how it looks after running bf...


And this is how it looks in EAsy info..


I have updated the chipset drivers and reinstalled battlefield without result. I guess its a hardwareproblem... maybe, but i run farcry in all the highest definitions and oblivion on medium, and the demo ran perfectly... :S

specs:
Zepto znote 1032b (msi motherboard)
1,86 ghz centrino cpu
geforce go6600 with the latest drivers
1 gig ddr2 so-dimm ram

anyone willing to give it a shot?

its obviously throttling... the cpu sped goes haywire when i move objects on screen... from 1800 mhz to a stable 790 when idle.
how do i fix that? it has not been a problem in other games O.o

well, according to speedfan (the only monitor working for me ) my cpu runs stable about 56 degrees celcius all the time. my harddrive varied from 33 to 40 degrees celcius, and the problem is still the same, even with all videosettings to a minimum. i can feel the air from the fan getting hotter, but that might be my harddrive.

First you need more ram, then you need to disable Speedstep to keep your CPU from throttling. If, like on a Dell laptop, disabling Speedstep causes your machine to stay at the lowered frequency, leave it enabled and download RMClock. In the Advanced CPU Settings tab uncheck "Enable Enhanced Halt state" this will keep your CPU from throttling due to Speedstep.
If heat is an issue get some canned air and blow the dust bunnies out of the vents.
http://cpu.rightmark.org/products/rmclock.shtml

I thought Speedstep on the Dell's was a bitch. If RMClock doesn't do it I don't know what else will,sorry.
Did you re-enable Speedstep in the bios before attempting to use RMClock?

But one question remains..... why did the demo run just fine???? Usually its the other way around: demos running slower due to unfinshed\unpolished programming. Not that this has anything to do with that

It's called speed step. It you run the game it will clock back to your original clocks anyway. I would just leave as is.

You can also change it in your power settings if you want.