I bought a new computer about 1 year ago. since then i have been upgrading it piece by piece. However I am not sure if it is running as quickly as i would guess that it should with what i have put into it. I tend to get about 25 fps in Portal (the only game that i have actually checked FPS on) when i am standing still in a normal room looking around. I have included some of the information that i got off of EVEREST, please LET me know how you think it should run games. If you need any more information let me know.

Computer:
         Operating System     MICROSOFT Windows Vista Home Edition
         OS Service Pack     -
         DirectX     4.09.00.0904 (DirectX 9.0c)
         Computer Name     MARCUSJR (Gaming Dude)
         User Name     Owner

 
      Motherboard:
         CPU Type     Intel CELERON D 346, 3066 MHz (23 x 133)
         Motherboard Name     Unknown
         Motherboard CHIPSET     ATI Radeon Xpress 200
         System Memory     2048 MB (DDR2-533 DDR SDRAM)
         BIOS Type     Award (03/21/06)
         Communication Port     Printer Port (LPT1)
            
      Physical Memory:
         Total     2045 MB
         Used     793 MB
         Free     1252 MB
         Utilization     39 %
 
      Swap Space:
         Total     3502 MB
         Used     885 MB
         Free     2617 MB
         Utilization     25 %
 
      Virtual Memory:
         Total     5548 MB
         Used     1678 MB
         Free     3869 MB
         Utilization     30 %
       
Memory Module Properties:
         Serial Number     None
         Manufacture Date     Week 7 / 2043
         Module Size     2048 MB (2 ranks, 8 banks)
         Module Type     Unbuffered
         Memory Type     DDR2 SDRAM
         Memory Speed     DDR2-533 (266 MHz)
         Module Width     64 bit
         Module Voltage     SSTL 1.8
         Error Detection Method     None
         Refresh Rate     Reduced (7.8 us), Self-Refresh

[ NVIDIA GeForce 8500 GT ]
 
      Video Adapter Properties:
         Device Description     NVIDIA GeForce 8500 GT
         Adapter String     GeForce 8500 GT
         BIOS String     Version 60.86.34.0.61
         Chip Type     GeForce 8500 GT
         DAC Type     Integrated RAMDAC
         Installed Drivers     nvd3dum (7.15.11.6369), nvwgf2um (7.15.11.6369)Your Fps will also count on your ingame settings - The Resolution, Antialiasing EtcThat seems about right to me.
Low end graphics card, older CPU, and a fair amount of RAM.
If you're into gaming I would DEFINITELY recommend a new graphics card, that one is not very powerful at all.
Also, a new dual core CPU would help.
Vista will also sap your gaming performance compared to, say, XP, but I'm not recommending that you change your OS if you're happy with Vista.
However this isn't really about upgrading, this is about your performance, which does seem about right to me.