I don't know, but the preliminary specs don't impress me much on the nForce 780. It's like a carryover from what we have now, lol with Tri-SLI support and continued 45nm CPU support for Penryn. These motherboards won't be cheap either....whew.
The 780i might be delayed because of the Penryn delay this December instead of November.
nForce 780i has Penryn issues, delayed until December?
Look at this thing
Comparison: Not much difference besides Tri-SLI, lol