What's your father going do use it for?
I don't game here and have an XP 2400+ which I put on an ECS L7S7A2 motherboard with 768 MB of PC2100 RAM. The 256b MB stick is crucial and I can't remember what the 512 MB stick is except I think it's pretty generic. This has been a good system and was pretty cost effective. I'm not sure what experience others have had with this board, but it's been good for me.