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.

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.