Prolimatech MK-26 Multi-VGA Cooler

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The most critical aspect of installation is that the heatsink be securely and safely mounted. A firm mating results in good contact between the heatsink's base and the GPU core and more efficient heat conduction. Ideally it should also be a simple procedure with the user having to handle as few pieces of hardware as possible.

For most Radeon cards the installation procedure is simple. Mounting clips with multiple holes for different GPU layouts are screwed onto the base. A backplate is placed on the trace side of the PCB with an insulating rubber pad to prevent short circuits and over-tightening. Spring-loaded bolts are inserted through the back to secure the parts to one another.

There are some problems with this method. It's difficult to line the bolts up with the holes the circuit board casting a shadow over the whole operation. Furthermore, the bolts go through long slits on the backplate rather than individual holes so positioning is a concern. The backplate can slide slightly in every direction making it difficult to center. Without vigilance, it's easy for the bolts to end up at an angle, creating uneven tension.

We reused some ramsinks from a previous cooler which almost got in the way of the heatpipes.

The heatsink didn't add any length to our HD 5870 test card but it hung over the side, stretching 5.3 cm past the edge of the circuit board.

The fan clips intended for the area near the rear panel are loose on one side as there aren't enough fins grip on to. Both 120 and 140 mm fans are supported but the clips are designed in such a way that only works with square framed fans. As our reference 140 mm Noctua NF-P14 fans have round frames we used our reference Nexus 120 mm models instead.

A dual fan adapter is included to use the PWM control of the graphic card's fan header. When 3-pin fans are used with this splitter, they run at full speed.

Installed in our test system, the finished product appears to take up five expansion slots but only because the right side dips down so far. It's really a four slot solution if you prop it up so that the board is parallel with the slot.

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