Integrated video/graphic card? WTF ISIT?!?!?

I bought an old "Compaq EVO D510 CMT" coming to me right now. Even though I have already a powerful laptop, I use it mostly for simple games/websurfing/porn which is absurb since I used it for hours non-stop without doing much high-end stuff so it might eventually overheat-errors,etcc if continue use. So I want this desktop to meet my web surfing and mainly simple games like the one I am addicted for life:



Gunz: http://gunz.ijji.com/guide.nhn

Gunbound: http://www.answerbag.com/q_view/3778



Links shows the requirements for the game I might be playing forever.



My Questions(I don't know anything about video cards):



1) Le Duche is integrated video card?



2) Video card is integrated in the above desktop model, so how do I know whether it meets the games above's requirements? or the integrated graphic card doesn't matter since ram is taken and used as ram for the video card?



3) If I wanted to changed my integrated video card, how do I know which one is best? by the "video ram" it provides? WTF radeon, nvidia, dunno what's the difference. I just want one that meets the games above and Runescape in it's highest setting(http://runescape.wikia.com/wiki/Game_req…|||http://h18000.www1.hp.com/products/quick…



That is a pretty outdated PC that has the Intel integrated Extreme Graphics 2 (circa 2003). It is very weak for gaming and only supports the very outdated Shader version 1.1. Most games require version 2.0 or 3.0 support.



You can improve the gaming performance of that PC by installing a real or dedicated graphics card on the vacant AGP graphics expansion slot. Any of the cards here should work;

http://www.newegg.com/Product/ProductLis…