The MDD's power supply is a bad design, IMO. I just don't like the fact that it sucks in hot air from the inside of the computer and exhausts it out the back. They should have installed a shield on the supply that sucked the air in from the outside. The air that comes out of my MDD's supply is insanely hot. I have the ACBel 400w supply (The "loud" one)

I'm still thinking about drilling some holes in my case, and fabbing a shield so that it sucks it in from the outside. The side of my case might have holes in it, but they would be effective and useful.