However, where ATI does seem to be behind NVIDIA at the moment is in regard to the overall feature set and refinement of their multi-GPU CrossFire platform. With SLI, users need only purchase a pair of GeForce cards and an nForce 4 SLI or SLIX16 chipset based motherboard, plug everything in, install the drivers and go. And up to this point NVIDIA was the sole supplier of motherboard chipsets that offered x16 electrical connections to both PCI Express graphics slots with their nForce 4 SLIX16. The nForce 4 SLI, ATI's Radeon Xpress 200, VIA's K8T900, and Intel's 975X Express offer only x8 electrical connections to the each graphics slot when a pair of video cards are installed..



Link: Hot Hardware