Nvidia Detonator video driver version 50.06.
This is the first release of the new 50.xx series ever but unfortunately this is a 64bit operating system driver only. It supports Windows XP 64bit and Windows Server 2003.
The driver has been released by Hewlett-Packard for their workstation models zx2000 and zx6000 and according to the release notes you must have the HP zx1 AGP GART driver installed.
Download link:
fxp://ftp.compaq.com/pub/softpaq/sp24001-24500/SP24317.exe