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The most critical aspect of installation is for the heatsink to be securely
mounted. A firm mating results in good contact between the heatsink's base and
the GPU core and more efficient heat conduction. Ease of installation is also
important; a simple mounting scheme means less hardware to fiddle with, and
a reduced likelihood of screwing up.
Our test card, a Radeon HD 4890. The stock cooling plate is left
on because it's a far more efficient method for cooling the VRMs then
what most aftermarket heatsinks provide.
Like the Musashi,
the Setsugen uses thin screws with threads on both sides. However the
mounting plate has been altered instead of pre-drilled holes there
are small nuts each sliding on its own rail. As there is no way to lock
them in place, this will result in an uneven mounting.
As a result of this quirk, we actually had to install
the cooler twice. The first time around we found that two of the on-die
GPU sensors readings were more than 20°C apart on load; typically
the difference is only 5°C at most. On the second mounting, the difference
The longer sides of the screws go through the PCB and are secured
to a padded mounting plate using large nuts. It should be noted the entire
installation is requires no tools.
The cooler overhangs the side of the card by approximately 4.7cm.
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