Since 1998, when I bought my first computer (that wouldn't run a MHz over stock speed), I have been using water cooling of one sort or another to help with overclocking. After having run with a water block and an external tank inside my fridge, a "bong" type cooler, standard radiator cooling, water cooled peltier systems and just using a 50 litre container full of water with no radiator or fans, I figured I could do better if I could get the whole computer inside the fridge.

As I had a spare A7V266-C, PSU, RAM and a XP1700+ not being used, I decided it was time to try. I found a used hotel room type fridge that looked just big enough for the water tank, mainboard and other necessary stuff to make the computer work. Several days of food/beers/coffees and placing various components in a number of different positions later, it was sorted.

First I made up a water tank of 3mm clear acrylic sheet that fitted in the lower part of the fridge:

Then from the same acrylic sheet, I cut a piece to mount onto the mainboard; this also formed the cover of the water tank. Just under the CPU socket, I bolted a slim 60mm fan to blow cool air directly upwards to cool the back of the socket. In the front corner of this, I used a PCI slot fan to blow the warm air from around the mainboard back into the water tank to cool down again.

As fridge doors were not really designed for computer parts, it was trashed, replaced with a stainless steel frame and clamped in place to form an airtight seal.

To fill the hole in the middle, I bent up a piece of 5mm clear acrylic sheet, as you can see in the picture. The top part of this is used to house the hard drive, floppy drive PSU, front panel USB/sound sockets, LED's and power/reset switches. They are outside the cold part of the fridge, but still inside, if you see what I mean. In the base of this, I cut a long slot to run all the cables down to the mainboard. All the cables were run through a separate panel and sealed up.