Hey, I'm new here and I don't have a ton of knowledge about computers and such but I have a bit of a problem. I play games on my computer but its not a high end computer, its a compaq pentium 4 with 512 RAM. I have played games like Starcraft, Counter-Strike, The Sims, Roller Coaster Tycoon, Warcraft III, and recently World of Warcraft on it. The problem is that no matter what the graphical power of the game every 2-4 minutes the screen will freeze (in game) and after about 5-10 seconds It'll will return to normal except for online games I'm not playing for that 5-10 seconds while everyone else still is. I'm pretty certain it's not the graphics card because I just bought a new one the other day (WoW wouldn't run on my old graphics card) and now it works fine except for that lag every 2-4 minutes. I saw on the internet someone suggest that you have at least 768 MB of RAM and 1GB is even better. I don't know if I should buy some more RAM or if the problem is something else. If anyone can give me some suggestions, that would be great.