Even though the GTX480 is the one garphics chip which needs the most power under load also the GTX470 is much butter in this discipline. Therefore we wouldn't really have thought that a NVIDIA board partner would be crazy enough to build a card using two GTX470 GPUs on a single PCB.
If you quickly do your maths you'll find out that a card like this will draw way more than 400 Watts from the power supply unit which is absolutely insane. But being a true hardware enthusiast you wont think about power consumption, the only thing that matters is performance and we're quite sure that this card will have plenty of it.
Source: Hot Hardware
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