Sandi1987 :
I have huge FPS drop in Max Payne 2 and other games. Even Serious Sam 1 lag (FPS drop). I have Windows XP.
your system is nearly 13 years old. Chances are some or all of your hardware is failing.
It is dependent on other variables like the amount of ram you have and what GPU. To be honest though, i'd park that system and use it for scrap.