Enter RD580... One chipset that does two GPU's

nVidia dual GPU (SLI) motherboards transfer data via the southbridge.

Mainstream performance differences between ATI and nVidia

ASUS came up and showed this slide calling the ASUS A8R32-MVP Deluxe their fastest motherboard for gaming on the AMD side.

In closing I'll leave with this overclocking slide. ATI said the Corssfire Xpress 3200 is stable up to 140MHz on the PCIe bus and just over 150MHz on the HyperTransport!
