So here it is ... after many weeks of sawing, filing, drilling and soldering, i finally finished it (at the end of January 2005).

It is so utterly silent that you can hear the machine only if it is absolutely quiet in the room. Often a look at the LEDs is a more reliable way to tell whether it is running. :-)

The entire water cycle is running below 35 °C (at 20 °C room temperature). It includes the CPU (core temperature 42 °C under full load), the chipset (graphics on board), the hard drives (previously at 45 °C - ouch) and the power supply's power components.

The CPU is now overclocked to 2.8 GHz (2.4 GHz nominal) - with this cooling it does not even notice. :)

As the hard drives are now mounted between heavy metal blocks (as opposed to frames before), they have a slightly better seek performance. And are hardly audible, of course. :)

Update (somewhen in 2006)

I noticed severe corrosion of the solder due to it making a galvanic cell with the copper (I anticipated this effect, but wasn't sure how fast it would occur). Therefore I unsoldered everything, cleaned up the parts and glued them with J-B Weld ™ (most other epoxy glues will swell and disintegrate under the constantly submerged conditions). To accomodate the glue's way lower resistance to shearing forces, the radiator underwent a re-design (photos yet to be made).

2nd update (summer 2008)

In retrospect, I should not have truncated the radiator resp. made the new one bigger again - on really hot days the system runs up to almost 50 °C unter full load, which is definitely too much.

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HDD case. It holds the HDD block together only.
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CPU cooler
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Power supply
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Relay for the pump and the non-heating apparatus outlet
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Close-up of the power supply's secondary circuit power components
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How it all looks like in the end. :-)
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Another perspective
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A view from the rear. You must admit, the radiator is art. :-)
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Close-up of the mounted CPU cooler. Looks outright lordly, no? :)
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CPU cooler from the side. Here you can see the closures of its water channels.
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Rear side of the HDD pack. It must weight at least eight kilos.
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And a side view of it ... sort of.
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Water tank with submerged pump
For reference, my old water cooler.