In my experiments with FsAutostart the main lesson that comes to me is that a strong vid card alone can not gaurentee high average frame rates.
You may ask how do i come to this conclusion just by using FsAutostart? Elementary my dear Watsons. If FsAutostart improves performance by shutting down un-necessary resource leeches then its very obvious whats happening is that ram is being freed up. If alll that released system memory means an extra 5-10 fps then its very clear that the vid card needs as much system ram flowing through the bus as it can get in order to do all it was designed to do. Therefor the more ram available system wide the better that fancy new vid card will perform.
I thought simply upgrading from the radeon 9200 to this nice new 6600GT would gaurentee me unbelievable performance. I was disappointed. It wasn't until I noticed by using FsAutostart that the card alone isn't enough and that with only 768 meg of system ram I definatley need more. So for all of you out there thinking that blowing 200-400 USD will get you where you want to be think about more ram first. If your running a gig n a half or 2 gig and yer frames still don't stay consistantly above 24fps then by all means get the best card you can afford but invest in the ram first. Its a lot cheaper than the state of the art cards and you might just get where you need to be and save some cash.