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By doing this the heat is drawn further away from the graphics card, resulting in less heat reflection back onto the card. On top of this the CPU cooler along with any side mounted case fans will help to cool the heatpipe. The only downside to this is if you have an SLI setup as you could only use one of these cards if you plan to extend the heatpipe fully. I wouldn’t suggest using this card in a machine with poor cooling, as it will overheat unless you have at least a couple of good fans in the case.
The heatsink on the card helps to cool the memory modules while the GPU interface is a copper plate. If you look carefully at the bottom of the card you can see how the heatpipe is directly interfacing with the copper plate. The heatpipe is coated in thermal grease to make sure that it interfaces well with the heatsink and copper plate.
The heatsink is held in place on the card with four spring loaded screws which are supported by a plastic rear bracket. This is five screws less than the standard cooler and I was expecting to find more due to the extra weight of the heatpipe. A metal bar has also been fitted to the top of the card to prevent it from warping due to the heat.
But enough about the cooling, let’s take a closer look at the card itself. The EN7800GT Top Silent doesn’t differ much from the reference design, but there are some component changes. The PCB is blue as with the Asus Extreme N7800 GT. The outputs consist of two DVI ports and a ViVo connector. A special cable is attached to the ViVo connector which adds component video, composite and S-Video out as well as composite and S-Video input.