Right Case for Mobo

[unwrittenLaw]

I'm a bit of a newbie and want to build a new P4 system using parts from my Dell Dimension 8100...Once I find a new mobo, how do I find a case to fit it (with the correct back panel, etc..) is there a way to know which ones will fit with each other..?
Also, anyone know a good mobo that uses PC800 Rdram?

Thanks

 

[subconcept]

Any motherboard labeled ATX (which your probably looking at) will fit any ATX form factor case. ATX is like way of keep a standard size so that motherboards will fit into cases. Just like atx power supplies are a certain size so that they fit.