Good spot, I did miss the GeForce 7900 GTX out of my list of boards - For info though, yes, it's running at reference clock speed.
I didn't use a GeForce 7950 GTX, because they don't exist. ;) I didn't use a GeForce 7950 GX2 because I don't have one, sadly. Nor do I have two GeForce 7900...