Sudden drop in frame rate during gaming

[batigoal]

Hi. My computer is around 2yrs old and it has always serve me well in games. It's only recently that it started to drop frame rates all of a sudden while gaming. I didn't have this problem b4 wif the same games and I did clean my cooler fins and fans once in a while. Anybody has any idea?

 

[dustin_ds3000]

whats games are you playing that have the drop in frame rate

 

[batigoal]

Pro evolution soccer 2010, COD Modern2, Protoype, Dragon Age Origins and Left 4 Dead 2. All of these games now play wif inconsistent frame rate. The biggest difference i realised is Protoype. I used to run it smoothly without a hitch wif the same graphics settings. But now it's just give me like 10 to 20 fps sometimes when i'm glyding across the city..