Starting with a pair of Mark 80 heat sinks that I bought a Computer Nerd USA http://www.computernerd.com/coolsp06.htm
I disassembled them for the Heat Sinks, which measure 155MMx75MMx25MM and provide a large cooling surface area. One of the biggest hurdles was the Tyan Motherboards. With a 48mm spacing between the SC242 Slots, there is NO room for any type of large heat sink and fan. Now add a 12.5MMx50MMx100MM cold plate and two 40MMx40MMx3.6MM ICE-71™ peltiers from TE Distributing http://www.tedist.com/specs/index.htm. Since the space between the slot1's was so close that cooling had to be from the side. I took out a roll of 28ga. Sheet metal, some tin snips, a roll of solder and a butane torch to make the shroud for the heat sinks and fans.
Because the area in which the air flow was passing is so small, as you can see from the pictures, I elected to use 120mm, 115CFM fans, and then stack them to make sure that I was getting 55CFM to 60CFM across the heat sinks.
Now I forgot to get pictures of the cold plate assemblies, but basically I surfaced the heat sinks to a tolerance of about .01mm using a piece of glass and various grits of wet/dry sand paper. Then the four peltiers were sandwiched between the two heat sinks and cold plates with heat paste and six #6x32 screws. To attach the Coppermine® to the cold plate, I used #6x32 screws by taking a flat file and filing the treads off the screw just below the head. I used #6 nylon washers to insulate the screws from the PCB. The whole assembly was then "encased" in 3/8" high density, closed cell foam, by cutting pieces and using black silicone to "glue" them together. This sealed the PCB and CPU core from the ambient air prevent any condensation.
I built another shroud to direct the hot air out of the back of the case and provided a hole in the side of the case for the 120mm fans to acquire ambient air from the room. The peltiers are powered by a 35amp, 0-15v variable power supply which I built and installed in the case.
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