I haven't got problems with nv anytime. The only problem with nv is that it does not support 3d acceleration
My BIOS is the latest. WinXP works rather good if that OS may work good
I asked about you because I want to know if it has meaning to send my problem to the official nvidia e-mail.
I'll post ps result later but I see nothing special there. As I think the problem is in a driver itself. When I used FreeBSD 5.0, GF3 and the first nvidia driver everything was okay.