littleleo :
If Nvidia is selling the reference cards for $699 and your a board partner and you running a GPU clocked at a higher speed with a more advanced cooling solution why would you sell it for $100 less? Why not charge more then the $699?
It's highly unlikely that you'll see cards with custom PCBs, customer coolers and overclocked for $100 less. That is the partners suggested retail price, but they aren't restricted from charging more.
What is likely to happen is that we'll see custom coolers on reference specced cards for that cheap, and overclocked cards will come somewhere between 599 and 699.
There's no incentive to charge more though. People who want a Founders edition are going to seek it out for the blower cooler for better SLI support.