is my cpu bottlenecking the system?

no no it is something else, i used to have same cpu xcept with 6800gt well it runs smooth with overclocking the cpu at 2.66ghz.

The windows xp x64 might be messing with your performance. You cant get drivers for a lot of stuff with that OS and the drivers that there are for it dont work very well a lot of times if they work at all. It will probably be a year or two till they get that OS working properly. You should probably switch to XP home or pro x32.

I disagree, I am running x64 pro/corporate and I have pushed some good speeds and kept it stable, I admit drivers are few and far between but they are there, I have found them for all my main components and aint having any real issues, tbh my mobo seems to prefer the x64 OS as with winxp pro I had load of bugs.............

If you cant find the problem mate I suggest format and beginning again and noting a what point things are going wrong, it is a tiresome process considering the couple of hours it takes for a full install is valuable gaming time but needs must as the devil drives and a format is a sure way of resolving any issue as for the chip dont be daft 64's a good chips to play with ;-)

specifically gaming im getting about the same fps as i did with my x800 at the same settings i was just wondering if it was the cpu that was holding it up

If its battlefield 2 mate that would be because BF2 is capped to around 100fps, quite alot of games are, another problem is some games dont support certain drivers very well so try rolling them back a version at a time to see if that helps

make sure you have the newest drivers.

and did you uninstall your video drivers before you put the new card in... or did you just swap them out?

a lot of the games will max out at 100 fps, all you need to do is max video quality. it'll still be pretty smooth, especailly in BF2, so just give her a try and work with it. btw, you're using "bottleneck" in the wrong sense, because the bottleneck is the slowest part of a system, which obviously isn't your processor.

if you want more FPS, disable vsync, and look for a command that allows you to set the fps_max.
I'm not sure about BF2, but some games are more CPU dependant than video card. I play CSS all the time and it's a CPU dependant game..