Well, the simple way to do it is go into the control panel and check out the sound settings. Somewhere in the menus (depending on how you have XP set up) it'll tell ya the name of your soundcard. Many times, Windows XP won't give you exact models of certain types of hardware, but it should at least tell you what brand/basic model it is. Mine says SoundBlaster Live!.
You can use a program like SiSoft Sandra to find out this information as well:
http://www.sisoftware.net/index.html...86&langx=en&a=
-Lasereth