Called EK FCS5870, it is a full-coverage water block from the looks of it, cooling all essential components on the PCB, including the GPU, memory, and VRM. The first picture below shows a CAD drawing of a design candidate.
EK prepping Radeon HD 5870 waterblock
Posted on Monday, Sep 28 2009 @ 20:18 CEST by Thomas De Maesschalck
TPU reports EK Water Blocks is working on a new waterblock for the Radeon HD 5870. The design should be finalized within the next couple of days.