Re: CS Source and GeForce GO 6800 Ultra
It's not uncommon for you to get lower FPS in actual gameplay then you would on a demo test. The reason for this is that while your CPU has all of it's resources free to help run the demo, when it comes to actual gameplay it has to work on different things. I know the Pentium M has a VERY low L1 cache and that could be a bottleneck.
The fact that everything was fine for you until recently means that you may have installed something that is now running in the background taking up some of the resources needed for gameplay.