(no subject)

Crud. I installed my new ATI Radeon HT 2600 XT, and now I can't get any sound, even with a new headset. The Net tells me this is a common problem, the solution to which is to have a second video card engaged alongside it. Unfortunately, I'd already followed advice to uninstall the default graphics card driver (no hardware removal), so I can find no trace of it on my system. Does this mean I have to buy yet another?