Revision 2 is now made of a custom aluminum extrusion allowing higher and thinner fins for better convective cooling, and fin orientation is now longitudinal. The initial release was CNC machined from billet aluminum.
The Caldera heatsink is designed to cool surface mount components (memory, voltage mosfets, I/O chip) on AMD's reference series HD4870X2 graphics cards.
The Caldera Heatsink is compatible with the MCW60 VGA water-block, as well as the upcoming Caldera 4870X2 water-block. In both cases, it will allow the highest possible stable overclocks of these high-end graphic cards while keeping them cool and silent.
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