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Flower Heatsink
The Zalman VF700-Cu shares the same design as the CNPS7x00 CPU cooler series with the radial heatsink, which is a proven design. The VF700 differs from the CNPS7x00 series obviously in the size of the heatsink, as well as the way the bottom half of the heatsink fins are chopped off to provide clearance for motherboard components.
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Comparison
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The 'Cu' version features full copper fins, which improves the thermal conductivity of the heatsink. This increases its performance albeit at a cost in weight. The VF700-Cu is 50% heavier than VF700-AlCu.
As you can see from the picture, the copper fins are bolted together using two 6-centimeters-thick aluminium blocks on each side.
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Mounting
Unlike other radial heatsinks I've seen, the fan doesn't mount directly onto the heatsink. Instead, the fan mounts onto a metal frame, and then the metal frame is attached to the heatsink via four screws on both sides.
This way, the heatsink base will not get damaged by screw threads if the fan is directly bolted onto the heatsink. The same metal frame also prevents the clip from moving about.
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The base of the heatsink was polished to an almost mirror finish, providing excellent contact with the GPU.
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Base
The center of the base is slightly raised to clear the shim on certain graphics card like ATI R3X0, 4XX series, and NVIDIA's latest GeForce 6800 series.
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Side
Due to the small heatsink base, some GPUs with large heat spreaders will not have full contact with the heatsink, but it should not affect performance much.
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