Graphics card water cooling
The video board exchanger was very easy to do: it had a square aluminum disipator, it was only needed to cover it with a smal box that drove water through its fins. In the following scheme it's explained how that box was made, you can see there's a screen squared to to the fins to oblige water through the fins. The box is about twice as high as the fins, and the screen the same size.


The pic before assembly:
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Here a picture of the modified video card.
