Please HELP ..Evga 9800 GX2 issues..!!

[perfect5995]

Hello,
I was wonding if I have a normal performance of my EVGA 9800 GX2 ....
my PC
MB Asus P5k - P35
Core 2 Duo E7200 3.5/3
2*2 GB Kingston DDRAM2 (low buffered)
Evga 9800 GX2
HD 500 GB
PSU Corsair 750W

Recently I bought a EVGA 9800gx2 and for some game like Crysis , I have a lags. on 1024*768 high settings and very hight... My question is am I running underpowered? or is it the CPU?
I am using Corsair 750 W which i think it suppose to be sufficient. If I am underpowered, is there any setting that I can use so I can play the game with less lag. Or it is bottlenecked since my processor is Intel 2.5/3 ghz C2D .. or is it the fan of my processor?
Any help and support will be appreciated

 

[Helloworld_98]

not really, what fps are you getting?

 

[perfect5995]

I really don't know, I never checked that
how can I check it?

 

[Helloworld_98]

there's probably a shortcut on the keyboard.

 

[perfect5995]

what's that suppose to be
any help with my concern please?

 

[Helloworld_98]

go into the game and press the '~' key, type 'ShowFPS 1' to show fps and type 'ShowFPS 0' to turn it back off.

 

[perfect5995]

the FPS that I got from 27-35
does that help?