my foolish self did not even take the time to check if my mobo was compatible.
surprise, surprise.. it wasnt!
the Dell XPS 420 stock motherboard is apparently BTX. The case I got is ATX. And won't work.
So instead of returning it and paying 25 bucks in shipping I am just going to keep the case.
Can anyone reccoment a decent ATX motherboard? Does it matter if I get a really cheap one as opposed to an expensive one? PLEASE HELP!