Quote from Landis82:
I believe that the only way that these ETers have been able to make such a configuration work is because they have not been using the GeForce "8" series with the Quadro NVS cards that you speak of.
In fact, Nvidia says that the Quadro NVS cards are NOT compatible with the "8" series.
The reason I suggested it is because someone only a few days ago claimed he ran an 8800 with a 280 PCI and it worked just fine. I'll try to look around and see if I can find the post..