Okay, just so everyone knows, I'm totally new to computer hardware. I was under the impression that all Alienware X51s used a mini-ITX motherboard (square and with 4 screws). I bought a new NZXT Manta mini-ITX case to move my components into so that I'd have more room for cooling and to expand my psu and eventually my gpu. Now I've got my motherboard out and it's larger than the others I've seen, having six screws instead of four. I'm kinda feeling retarded right now. What kind of motherboard is this, and can i get it to fit into the case? If not, what kind of case should I be looking for?