Will all computer cases hold the basic parts of a computer?

Will they all hold the same amount 1 graphics card 1 4 gb Ram ect? Because I am going to put all my new parts into my old computer's case and was wondering If they would all fit? probally a stupid question....

No they won't...

Full Tower's can hold anything...

Mid Tower's can hold most, but some might not be long enough for say a 5970 (longest card available at the moment)...

Mini/Micro Towers only hold mATX boards and are usually only able to hold low profile GPUs (if any at all)...

No they won't...

Full Tower's can hold anything...

Mid Tower's can hold most, but some might not be long enough for say a 5970 (longest card available at the moment)...

Mini/Micro Towers only hold mATX boards and are usually only able to hold low profile GPUs (if any at all)...

Buttons1990

there are some micro cases that can primarily lanparty cases :P