Yes, that is good. Here's proof too just in case if you are skeptic about the mixed manufacturered video cards:
ForceWare Release 80
Release Date: February 7, 2006
Adds support for GeForce 7800 GS AGP
Application compatibility fixes. For a full list of fixed and known issues please view the Release Notes.
Mixed vendor support for NVIDIA SLI.
TV-Out/HD-out support for NVIDIA SLI.
Added support for VSync on Direct3D games when running NVIDIA SLI.
Performance enhancements for dual-core CPUs.
PureVideo high definition MPEG-2 de-interlacing support.
Usability enhancements when connecting to an HDTV.
Microsoft® DirectX® 9.0c and OpenGL® 2.0 support
I thought I paste it here in case you don't want to go online to Nvidia's website and download the drivers just yet.