RJK said:
The 8800GTS video card in the first link, will fit
the single video card slot on the K10N78hSLI-WiFi
motherboard. Both hardware items are PCI Express x16
version 2 compatible (500MB/sec per lane, times 16 lanes,
equals 8GB/sec max transfer rate to the video card
per transfer direction).
The "Hybrid SLI" combines the puny graphics power
of the built-in Geforce 8200 graphics engine,
with the more powerful GPU in your 8800GTS video
card. You'd be crazy to enable it, as your 8800GTS
will do a fine job all by itself, and cause
less aggravation when used in a non-SLI mode.
What Nvidia is hoping, is you'd combine a lower
end card, like some $50 Nvidia graphics card,
with the 8200 onboard. But since you're buying
the 8800GTS, and the motherboard only has one
good video slot, then a non-SLI mode will work
best. (And judging by this article, the option would
be grayed out, since 8800GTS is not a supported
card for the "hybrid" option. An 8400 GS is more
likely to leave the option available. Your 8800GTS
is way more powerful than hybrid SLI with the
8400 GS.)
http://en.wikipedia.org/wiki/Scalable_Link_Interface
Paul