Please Identify Dell Mobo: DS/N CN 0WF816-69861-6CG-0B0A C/O CN

I have this old board I'd like to know what ram to use etc.  Like to identify it so's I can get the specsheet and know all about it before I realise it is an old piece of junk and throw it away...

Can anyone help?  I got a google hit on the first part of the number but it wasn't the right board at all.

There seems to be no other numbers.  This one is from below a barcode on the edge of the board.

DS/N  CN 0WF816-69861-6CG-0B0A C/O CN

I accidentally put this post in the laptop forum.  sorry about that. I'm sure it's not a laptop board.