As some users have noted, June has come and gone without the release of the Dawn demo. Unfortunately, our development team were unable to finish the demo in time and are continuing to work on it to provide all GeForce GTX 600-Series with the best possible experience.
One element that has contributed to this delay has been the introduction of a rendering mode for users with a single GeForce GTX 680. If you refer to the text above, the Dawn demo previously required a GTX 690 or GTX 670/680 SLI. We read user feedback and that was the mostly commonly requested addition, so we hope that users can understand the delay and give us a little wiggle room as we work to finish the demo to the highest possible standard.
Thanks for your understanding,
Delayed so that it can run on one 680 GTX