Please Fix Dual Core and 8x.xx Driver bug. Isn't it my luck, turns out the ocmbination of the nForce4 motherboard plus the nVidia 7800GTX and the Athlon x2 causes blue screen of death. Specifically, I get a blue screen of death with the latest drivers.
There are huge complaints on various forums, but this thread summariex it nicedly. Folks think it has to do with the dual core optimizations in nVidia drivers or perhaps with the very troublesome nVidia IDE drivers (you should uninstall these in most cases I've seen).
There is also a new beta driver called 82.65 that folks are trying and "Guru3D":http://content.guru3d.com/newsitem.php?id=3508 reports fixes problems. I'm installing right now and seeing if that helps the blue screens. Most of these crashes by the way are just running regular windows.