Originally Posted by pt
what if you have a xfi (top of the line) sound card
You buy one of the actually good PCI-E sound cards(X-fi is far from top of the line, I won't consider any card that isn't PCI-E and can't do realtime digital out top of the line).
Also, there is nothing saying that you have to have cards with double slot coolers. Who knows, by the time SLI physics sees the light of day, they might have the DX10 cards down to single slot coolers(at least maybe the cards one step down from the top cards might have one slot coolers like the 7900GTX>7900GT).
Also, there is nothing saying that the third card used for physics has to be the same as the beastly cards used for graphics. Who knows, maybe NVidia will do the same thing ATi said they will do, and let you use a significantly weaker card to do the physics, one that doesn't need a two slot cooler, allowing you to use the bottom PCI slot for a sound card.