In addition to its software licensed SLI support, Nvidia will also enable quad-SLI with up to four cards on its newly announced SLI license design boards. This is something that we haven’t seen before.

There will be four options. The basic one is a two times 16X PCIe design with two PCIe slots, then three-slot with one PCIe 16X and two PCIe 8X slots, three-slot with signal mix with one 16X PCIe and another 16X when two cards are plugged in, or two times 8X when three cards are plugged in.



The last and the most interesting one is a four-slot option with four times PCIe 8X. The boards with Nforce 200 are capable of supporting 3-way SLI with each slot supporting PCIe 16X or with two Nforce 200 chips you will be able to get the whole four PCIe slots at full speed of 16X.

You can imagine that Nvidia is working on a quad-SLI driver as we speak.

Update: We've just talked to Nvidia's chipset guys and we've learned that the four slot solution is for 3 Way SLI while the last slot is for PhysX graphic card. Quad SLI remains reserved for two 9800 GX2 cards that have four GPUs together.