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HEATSINK
Warning — removing the heatsink from a card generally voids the product's
warranty. Do so at your own risk. Note that all testing on the card was performed
before the cooler was removed.
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Removing the stock cooler is a simple affair, involving the removal of
several screws accessible from the back of the circuit board. The four
mounting holes around the GPU core has the same dimensions as the HD 3000
and 4000 series.
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The heatsink has an anatomy similar to the HD 4870/4890 cooler with four
removable parts, a two heatpipe heatsink for the GPU core, the fan, a
memory/VRM cooling plate, and the top cover. Unfortunately we weren't
able to separate the cooling plate as the screws securing the cover were
too small and tight for the tools we had on hand.
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The stock fan manufactured by AVC has a massive 14.4 watt power rating.
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One of our favorite heatsinks, the Accelero
S1 in incompatible with the HD 5850 as there is a box cover over
the DVI ports blocking it, though you could easily bend a few fins to
make it work. For reference, the distance between the edge of the DVI
cover and the center of the bottom left mounting hole is 57mm.
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The Scythe Musashi
has much of its body shifted to the right side, so it cleared the DVI
cover by a few millimeters.
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