Thanks, friends.  ^^  You've jogged my memory.

  I don't need SLI - I don't game.  TinkerBell will be used to model, UV map, generate texture and displacement map images, and to do some scene setup work.  Cameron and Galadriel will do the rendering "heavy lifting" work.

When I get a chance to fire Tink up later today, I'll look for that nVidia control panel switch -which I now recall seeing- for setting whether the cards run in SLI.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5