This is before the wiring was tidied up properly (although using round SCSI, FDD and IDE cabke helped). The high-tech cardboard will eventually be removed and used as a template to cut a permanent heat duct from sheet plastic. By removing two high-speed axial-flow CPU fans and making use of the existing case fan (inside the heat duct), sound levels were drastically reduced - as were the CPU temperatures! The CPUs are hidden under the duct, as are the copper bases of the heatsinks. I've recently varied the design to make the duct triangular so as to draw heat from the entire surface of the heatsink. (That's why I used cardboard to make the templates, in case the design changed)

Heat Pipe Coolers

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