This board and it's SLI brothers have broken numerous performance records around the world in both 3D and HTT overclocking, and in overall system performance.

The nF4 SLI-DR is based o­n the nVidia nForce4 SLI chipset, while the nF4 Ultra-D is based on the nForce4 Ultra chipset. Both of these motherboards include 2 PCI Express X16 slots and they use the same BIOS. The main difference is that the Ultra-D doesn't come with the 4 SATA ports that are provided by the Silicon Image 3114 on the fully featured nF4 SLI-DR board..



Link: XtremeResources