Turns out the new video card also freezes after running things for a while.
Not blaming the videocard itself, I procured an Athlon 900 and motherboard.
If these don’t fix all the freezing and crashing I’ve endured for several
years in trying to piece together the right combination, I shall be highly
frustrated. We shall see. Lesson learned–buy a fully assembled
system. Incidentally, if you want to know, here
is how composite resin dental fillings are done these days.