June54,
You do not need a NIM server if you can allocate a CD-Rom to one of the partitions (if partitioned) to reload AIX onto it, it will be a plain basic image without any of your data you will have to reconfigure the box as you need... If you want to move the image from another server you can make a mksysb and then clone it to the 670..
So no you do not need a NIM server to load the new server.
any questions let me know
Frank Soprano