I've been sitting on a pile of parts for almost a year now - not a healthy thing when it comes to motherboards and CPUs, so when my vacation rolled around I figured I'd better start materializing the ideas I've had banging around my head. "Constellation" is a bit of an atypical mod. It isn't going to be built to be pretty - just practical. The base I'm building on is beige, and it will remain so. The only lights that will be installed are indicator lights, and all the fan grills are wire. Instead, what I'll be building is a desktop cluster computer. Four independant systems in a single, self contained box. I've been dreaming of building a system like this since the very first time I ever saw a case big enough to stuff more than one motherboard in It probably won't be used for much practical work - I'll be experimenting with Beowulf clustering, render software, and some simulation work. What will be going in it is this: 4xAsus M2A-VM, AMD-64 Dual Core 4200+ (2.2ghz), 2gb Ram Integrated KVM (Keyboard, Video, Mouse) switch Integrated Gigabit Network The unit will have a single power cord, a master power switch, and a single ethernet jack. I'll be configuring all four systems as compute nodes, with a head node in my computer rack for easier access. Hardware is a little on the old side, now, but I got it cheap and it will be enough to play with. A goal of the project is to make it reconfigurable enough that I can easily upgrade the hardware. I'll be stuffing everything into this: It's an old beast of a case I got years ago at an auction, pretty much expressly intending to do exactly what I'm doing now - filling it with as many computers as I can Of course, AFAIC, four computers also means four power supplies. Fitting four motherboards, four power supplies, a power distribution system, a switch, and a KVM into one case is a bit of a tight fit. I really hope it works First thing to do is to figure out the internal layout. I spent a very, very long time mentally imaging how I'd fit it in, then I found out all my elaborate schemes were worthless when I sat down and actually mocked up the motherboards. This is the space I have to work with. The solution on how to fit the motherboards is pretty simple, illustrated thusly: And the power supplies were almost as easy. Flip it around to the other side for the other pair of MB/Power supplies. Now, how am I to stack a pair of power supplies on top of each other like that? First, I'll need something to attach them to. A piece of angle iron and some elbow grease later: It'll go something like this: With some aluminum spacers for sitting the power supplies on: Thusly: A little more polished. Those bolts stick out the bottom of the trays, and will be used to attach to the bottom of the case. Like so. I'm going to hold off trying to actually mount them in the case for now - in case I need to adjust things later. I had all sorts of elaborate aluminum do-dads I was going to fabricate in order to actually stack the power supplies together. Once again, reality (and my innate laziness) took over and I went with a more practical option: Industrial strength Zip ties I'll be holding off on the actual installation until later in the build.