Looks like my GeForce 3 is finally giving up the ghost. This is the one that lost its cooling fan long ago. After some time, even just sitting on the desktop, there will be vertical lines, pink squares, and other assorted anomalies on my screen. Then everything locks up. I thought perhaps underclocking the card may help a bit, but that seems to make things worse. Does everyone agree with my diagnosis? I could use a new card anyway. What's the newest GF FX? The 5900? More importantly, what model is right below top of the line? Obviously I haven't paid much attention to video cards for some time. 