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G4 Cube Water-cooled


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I recently buy a G4 Cube in eBay. It works very good and it's fast with Tiger. But with Leopard, the 1,8Ghz PowerPC processor or the 1,5GB of RAM are useless, because the Nvidia 2MX makes Leopard so much slower. Then, I need a new AGP graphic card, but it must be with a fan (obviously), and I really don't like it. Now, the Cube has got a fan for the 1,8Ghz processor, who trough the hot air to the main heatsink. But, ironically, this enormous heatsink doesn't help to cool the graphic card.


I finally think: Why not water-cool it? Water-cool is silent and completely fanless. Like the original Cube. But there is a problem: space. The Cube is really compact, but finally I see some options for do it conserving the original internal structure.


The "biggest" empty space in the cube is between the Superdrive and the hard drive. It's a 155x150x25mm space. I can build a hard drive support and put it there with a small reservatoir, and I can put the radiator on the original hard drive support. Then, the radiator is next to the main heatsink and it should dissipate all the heat. I will make a passive copper radiator for there, too, because there aren't any commercial radiator with these measures.


If it isn't enough, maybe I can put other tiny radiator in the other side, in front of the processor and its water block, but I don't think there are enough space for a radiator there. But my main problem is... the pump. Where I can put it? How can I power it? I was thinking about a Mini PSU power supply replacing the 56k modem board, but I prefer not use two external power supplies if I can. And the pump is too big for the 155x150x25mm. I think all of them are about 50x50x45, and I can't make one homemade.


NOTE: I will water cool the graphic card and the processor, not only the graphic card. And if it works fine, maybe I can water-cool other components.


Cube specs:

1,8Ghz G4 Processor

Nvidia 2MX (Nvidia 9800 Pro in the future, I think)

1,5GB of RAM

80GB 3,5" HDD

AirPort Card



What do you think about? Do you think I can do it? Where can I found a small pump?

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