[snip]
"John Russell" wrote in message
...
Nvidia have the right to the acronym SLI but don't get confused into
thinking this is Scan Line Interleaving,as it isn't.
[/snip]
According to NVIDIA for SLI = Scalable Link Interface

[snip]

From what i've seen only one card is responsible for generating the image,
the other is just a second GPU which performs tasks allocated by the first
GPU. This is far more efficeint than the Voodoo solution as no graphics
calculations are done twice.

[/snip]
Each GPU will start half and will change depending on the load. Software
will determine which load to distribute to which GPU.

[snip]
It also means that cards don't have to match so another upgrade path
becomes available. You can add a new faster card as the master and keep
the
old one as the slave GPU.

[/snip]
You will need both identical card. Best is to have that same card from the
same manufacturer.

CapFusion,...