This GTX 580 is EVGA’s reply to ASUS’s Matrix GTX 580 or MSI’s N580GTX Lightning Xtreme Edition.
The GTX 580 Classified features two 8-pin and one 6-pin power connectors. The max power draw allowed by this configuration of power connectors is 450W (see here for details). ASUS’s Matrix max power draw is only 375W!
I think this GTX 580 Classified, like ASUS’s Matrix, has no power limiter (read no FurMark limiter!) and then will offer nice overclocling capabilities.
The card also exposes voltage check points (GPU core, PLL and memory):