Poor performance on Desktop

[jjbpenguin]

I bought this desktop from buy.com and threw in a new power supply and video card thinking it would keep up to date on games for awhile while keeping me sub $500 buget. Problem is I am not getting frame rates I was hoping for, even whe dropping quality down. I am playing Fallout3 on medium settings and can get 40 or so inside, and average 20's outside, but what was really odd was playing Team Fortress 2, i was hitting the teens on somewhat busy maps, and just to test, dropped the resolution and all video settings down and still barely hit 30's durring a fight. I realize my processor isn't the most impressive, but is there a way to tell for sure what my problem is?

Specs in the sig.

Thanks in advance.

 

[ThatGuy16]

What video card and power supply did you install? Is it the system in your sig?

 

[mx344]

What Graphics card did you get?

EDIT: well what they guys said above me...Although, anything should be better than onboard 6150SE graphics

 

[jjbpenguin]

sorry, my sig didn't update, i have an EVGA Nvidia 9800gt and a 600w thermaltake powersupply

 

[Number1SuperGuy]

Looks like it should be fine to me. Did you install the drivers for the new 9800gt? Maybe your computer is still trying to use the on board 6150?

 

[ThatGuy16]

make sure on board is disabled, check to be sure your drivers are up to date.

Also, go to run/msconfig to check for unwanted "junk" on startup.

 

[mx344]

O yaa, i would make sure that the onboard isn't still running, cause you will notice a HUGE difference from crappy onboard graphics to a 9800GT...

 

[BlackRat]

Your CPU is the weakest link, all the rest is fine.
I have used Phenom 8450 and it was good just for medium settings in most games, only to keep above 30FPS

 

[jjbpenguin]

thanks, i will probably hold out since most games are still playable and get a new CPU in a year or so, maybe sooner if something like starcraft 2 comes out and needs it.