Just spotted this bit of Info over at the TechReport
Amid the hubbub over the introduction of the GeForce 6600 line and the GeForce 6600GT's ability to work in an SLI configuration, folks from NVIDIA were dropping hints like mad at Quakecon about the company's plans for its next-gen Athlon 64 chipset with PCI Express support. NVIDIA is obviously working on a north bridge chip that will allow dual PCI Express graphics slots, and the company is confidently predicting SLI performance markedly superior to the dual Xeon-based motherboards that are powering the first SLI demo systems.
Amid the hubbub over the introduction of the GeForce 6600 line and the GeForce 6600GT's ability to work in an SLI configuration, folks from NVIDIA were dropping hints like mad at Quakecon about the company's plans for its next-gen Athlon 64 chipset with PCI Express support. NVIDIA is obviously working on a north bridge chip that will allow dual PCI Express graphics slots, and the company is confidently predicting SLI performance markedly superior to the dual Xeon-based motherboards that are powering the first SLI demo systems.