Gigabyte Volar CPU heatsink/fan

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Like most aftermarket heatsinks, the Volar is built on heatpipes that extend upwards to the fins from a thin copper base.  It's a good design, which is why it's so common.  What's not so common are the fins, which at first glance appear to be cut from a single piece of extruded aluminum. Closer examination reveals that the fin block is actually two pieces that fit together, sandwiching a loop of heatpipe in between them.

A frameless 120mm fan.

The fin block uses the same twisted, split-fin design as Intel's stock heatsink, though it lacks the solid copper core and has been expanded to fit the dimensions of a 120mm fan.

A closer look at fin spacing, with the metal mesh visible in the background.

Fin spacing is reasonably wide, but the fins are thicker than usual because they are cut from a two stacked pieces of extruded aluminum rather than individual bits of metal.  The block itself is just over an inch thick, enough to provide plenty of surface area, but possibly too much for a low speed fan to force air through.  The edges of the fin block are wrapped with a strip of wire mesh that helps direct most of the airflow down through the fins rather than letting the air spray out of the sides.

The fins are mounted at roughly a 45¬į angle over the base.

The fin block is mounted at an angle rather than vertically or horizontally.  The reason for this design is unclear, but we may speculate that it is intended to be a compromise between a high back-pressure top-down design and a tower design that doesn't provide any airflow to the VRM modules around the CPU socket.  Reducing the dimensions may also have been a goal, but the 141 mm height is still pretty tall.

Heatpipe legs leave plenty of clearance underneath.

The fin block is mounted on four heatpipes that rise from the base.  The two shorter legs are actually opposite ends of a single heatpipe that is bent into a loop and wedged between the two halves of the fin block — hence Gigabyte's specification of three, not four heatpipes.

Fins are spaced wide enough that the fan blades are clearly visible through them.

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