Bub,
That looks exactly like my card except its made by ECS instead of PNY. While the 8400 series are not SLI compatible, it really doesn't matter.
SLI, and AMD's Crossfire, essentially combine multiple cards to work as a single super-card. This is only beneficial when gaming, but has no effect on what we're doing with DAWs.
Having said that, video cards
do not need to be SLI or Crossfire ready to be used in multiples in a system. Take my DAW, for example. My two 8400GS cards are not linked in SLI, but work as separate, independent video cards.
They show up in Windows as such and I can use all four of the monitor connections to separate monitors where in an SLI or Crossfire system, those are combined.
At the end of the day, don't worry about SLI or Crossfire compatibility for DAW use. And don't get hung up on buying exactly what I am using. If there's a newer nVidia or ATI card that's fanless and has multiple digital outs, then I'd probably go for that.