Well, when I'm playing Left 4 Dead on PC, I only get around 20-30 fps on 1080-768 resolution. Is there a way to get a higher fps ? I also find it weird cause my computer is pretty decent.

Computer SPECS:
2 gig ram
Intel Core Duo 2.2 Ghz
Nvidia 9800 GT Graphics Card
Windows Vista 32 bit

The same also runs the same on Counter Strike Source ... but I feel like I should be getting more from what I have.
try the gaming thread or computer thread. links are in the thread called 'forbidden threads' - because threads on those topics are forbidden due to us already having awesome threads for those topics.
from daylight...
...into darkness