For further details about the nForce 4 family and features, we encourage readers to check out our preview of the nForce 4 platform where we tackle some of the improvements from the nForce 3 in some more detail. Some of the topics include nTune, the improvements to the Firewall and to the drive controllers.
NVIDIA's Forceware 66.93 was used for the 6600GT across all platforms. The DFI nF4 SLI-DR was tested with the Forceware 6.39 driver package. The nF4 Ultra-D was tested with the ForceWare 6.37 drivers. VIA's Hyperion 4.55vp1 and the driver revisions for the Gigabyte nForce 4 SLI board can be found here.