The fact that the GeForce GF100 has high energy consumptions isn’t that much of a mystery: it’s easy to determine that by the fact that each card is connected with two PCI-Express connectors, a 6-pin one and a 8-pin one.

The Radeon HD 5800 series cards feature two 6-pin connectors, while only the dual-GPU HD 5970 has the same connectors as the GF100. It’s possible that these connectors will be different on the final version of the card, but we think it’s not likely to be that way.