system requirements for Xserver

I have a old system that I am going to play around with. A celeron 400 64mb of ram (trying to find another cheap 64 stick) and whatever size drive I stick in it. Suse requires 128 for graphical installation but I doesn't say about after or better yet with Xserver but no Xclient running on it. Yes I can install webmin for administration, But I want to learn about running the Xclient remotely. What do I need for memory to do that? It will end up a file server, but for know it is my use to learn so I don't break my dependable system. Thanks