DESPITE THE FACT that NVIDIA released its nForce4 SLI X16 chipset months ago, the original nForce4 SLI is still alive and well. In fact, some motherboard manufacturers have passed over the X16 in favor of new designs that use the plain old nForce4 SLI. That's an understandable strategy given the nForce4 SLI's rough feature parity with its successor, whose extra PCI Express lanes convey few real-world performance benefits..



Link: The Tech Report