[UPDATE] Test results are in!

Water cooling solutions are usually very expensive and I wanted to see how cheap I can do it using household parts and objects that were designed for a different purpose.

Parts

I'm gonna divide the parts in two sections: Water cooling and wall mounting.

Water cooling parts

Part	Where I got it	Image	Price
CPU Waterblock	ebay (german)		14 €
Radiator	Local car repair shop		20 €
Fabric enforced 8mm tube	Local hardware store		3€
Water pump	amazon.com		7€
Reservoir (could also use a small bottle)	-		0€
Distilled water	Local hardware store Link		2€

As you can see I'm using a car radiator since they are very cheap, easy to get and work like charm. Just be sure not to mix aluminium and copper parts.

Water cooling costs: 46€ (51$)

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Wall mounting parts

Part	Where I got it	Price
Backplate (plywood)	Local hardware store	3€
Carbon foil (looks better than wood)	Amazon.com	4€
Tube holders	Local hardware store	1€
LED stripes for backlight	conrad.at (german)	7€

Wall mounting costs: 15€ (16$)

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Let's build it!

Step 1: put the foil on the backplate

Step 2: Fitting the board on the plate and fixing it with screws

In this picture you can also see how professionally I mounted the waterblock on the CPU using perforated tape and two thin M3 screws

Step 3: Tube management

For tube management I'm using pipe holders. They helped me before managing my cables on my server rack. I'll probably paint them black later so they don't looks as cheap as they do now.

Step 4: Adding an LED backlight

The power supply for the backlight will be a power supply of an old laptop of mine. It's actually 16V but thanks to 12V voltage regulators this is no problem.

The LED stipes are held in place with some tape and connected to the voltage regulator

Looks good!

Step 5: The reservoir

I picked this one up in the local hardware store but I also could have used a simple bottle.

I hotglued a few LEDs on it. The LED plate is actually from an old IKEA lamp I disassembled. Fits perfectly and lights up good.

Inside view of the reservoir. Let's add some color.

I painted it with green polish (sprayplast)

And put some of the foil on the base to hide the LEDs

I drilled a small hole in the backplate so I can hide the power cables of the LEDs.

And then I fixed the reservoir with some more perforated tape. Man I love this metal tape thing

Getting better and better

Step 6: The radiator

It finally arrived and wow that thing is larger than I thought. Had to relocate the tubes

Step 7: The pump

Since I'm using a submersive pump (because they're the cheapest) I had to come up with an idea on where to put it. I initially wanted the pump in the reservoir but it didn't fit so I had an awesome idea: I put it in a glass jar and put green carbon foil around it

I think the jar was once full of spaghetti.. just FYI.. is anyone even reading these texts?

Not even leaking (yet)

Almost last step: Connecting everything

I connected the reservoir with the "pump jar" and sealed it with some industrial glue.

Light test: Works great

I added a fan for now like this. Since the radiator is pretty dark and has no good places to put LEDs on them I'll have to pick up some fans with LEDs (maybe)

Filling fun

It was... kind of tight.. so, of course it leaked. But there is no leak some more of that industrial glue won't fix

You can see the glue on the lid of the "pump jar". Maybe sometime later I'll paint over that so it doesn't look that shitty

Testing

For testing I removed the fan from the radiator since it should work passively cooled. Let's see if I'm right.

BIOS booting like a charm. Temperatures are good in idle

This is just 9°C above room temperature, nice! How about benchmarking it up?

The Benchmark

For CPU benchmarking I use plain old 7zip benchmark (which is included in 7zip)

Highest temperature was 40°C which is 16°C above room temperature. This is actually a pretty good temperature for passive cooling.

How loud is it?

Except for the gentle dabble of the water pump there is no sound. Of course not since there is no fan.

What's next?

This monster will become the new face of my webfilter service WEGA (german). I'll hang it one of the schools I work for and it will filter all traffic for inappropriate stuff. The kids will hate it and it'll look great. Should probably protect it with an acrylic glass front.

Will update with pictures asap