7/08/2012 06:30:00 PM
dannzfay
Many of our readers have already seen Gigabyte’s WindForce 5X cooling system mounted on Nvidia’s GeForce GTX 680 GPUs. So now we’re quite surprised to see that an AMD “Tahiti 2” based design is almost ready for prime time although we’re still waiting for the GTX 680 WindForce 5X.
The likely naming scheme is Gigabyte Radeon HD 7970 SuperClock WindowsForce 5X and the cooling system includes a massive vapor chamber solution that’s cooled by five 40 millimeters fans as reported by VideoCardz. Gigabyte’s Windforce 5x is practically cooled by five 40 mm diameter fans that will probably generate some serious noise. However, they will, most likely, offer more efficient cooling than fans that blow air in all directions. Gigabyte used a huge, three-slot wide cooling system that has a vapor chamber at the bottom that’s taking the heat of the GPU and the on board memory. The heatsink attached to the vapor chambers is likely improved by five 8 mm huge heatpipes that are increasing the heat transfer from the vapor chamber top the rest of the heatsink. The densely packed heatsink fins are topped with a metal plate, creating vertical tunnels through which the 40 mm top situated cooling fans will pull fresh air coming from the bottom of the card.
The fact that the air is travelling through the small space between the heatsink fins for a smaller distance is actually a significant improvement. If a back blowing turbine-like fan tried to push air through the entire length of the video card instead of its height as fins are oriented now, the rotational speed would have had to be much higher, and the cooling efficiency would have been considerably lower. The thing is that pushing air through such long “tunnels” between the tightly packed fins leads to increase air friction between the air and the “tunnel” walls, and the rotation speed of the fan must be greatly increased to manage to push the air through the entire length of the “tunnel”. There is also the problem of efficiency, as the air already pre-heated by the heat taken of some of the board’s components will be blown off over the fins that are meant to cool other components. There is n word on pricing yet, but AMD’s “Tahity 2” is a very overclockable GPU that will make it worth it.
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| Gigabyte Radeon HD 7970 SuperClock WindowsForce 5X Images credits to Gigabyte |
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