In message said:
Since nvidia makes video cards and motherboard chipsets, they figured
out by putting two video card slots on their motherboards, they'd sell
a lot of video cards. We went through this with 3dfx ten years ago
(who nvidia bought and took in their people). The very next video card
out was a single card solution that was faster than the SLI cards
together. End of SLI.
This time I suspect that SLI will stick around for a while -- That next
single card solution that is faster is a lot harder to develop since
we're already approaching some massive heat issues with video cards.
Second, we're not limited to a single AGP slot, or the relatively slow
PCI bus anymore.
Shortly after that "very next" card comes out, there will be a
SLI-capable version of that same card, giving even greater performance.
Personally, I'm just happy to be able to run two relatively decent cards
at the same time (not for SLI, just for multiple monitors)