This strange looking contraption is the water block, pump, and fill inlet. The block is constructed of copper 1100 and aluminum alloy 6063T5. It measures 71x68.5x18.4mm and weighs 330g.
Upon closer inspection you can see that the pump is the circular piece on top of the water block, and through the plastic you can sort of see the groves in the base of the aluminum/copper block.
At the backside you can see where water flows into and out of the block, and the tube where you can add additional water.
Here is a better shot of the inlet tube:
Here is a shot of the innards of the block, pulled from the Silent Stream's manual.
The design of the block is nothing too complicated here. It's strange that water never flows over the center of the block, but we'll just have to wait and see how that equates to its performance.
The base of the block comes with a smooth finish, but I certainly wouldn't call it polished. Don't be appalled by the GW103 silica thermal pad, which has a thermal conductivity of 5.1/W/m/°C (better than most pastes). You also get a 2 gram packet of GW101 paste however. The discoloration in the base is the copper portion of the block.
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