As shown, the GeForce 6800 Ultra doesn?t practically take any power through the AGP slot. The total consumption of the card on the 3.3v, 5v and 12v lines that go through the AGP is less than 5W. But the card consumes as much as 48.91W in the Burn mode through the 12v line of the additional power connector. The current in this line is 4.22 amperes, which is rather much even for the Molex 8981-04 connector.
So, it seems like the two power connectors on GeForce 6800 Ultra cards are implemented to ensure a higher stability of the system at large by reducing the noise and voltage slumps caused by the graphics card, which may negatively affect other devices attached to the same power rails. The reliability of the card itself is also increased as there?s a lesser probability of overheat, burning and other consequences of poor contact in the connectors.
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