From the transcript, when asked about Q2 Pascal volume and 16FF yields:
No surprises there.Pascal was just announced for 1080 and 1070, and both of those products are in full production. We're in production with Tesla P100, and so all of our Pascal products that we've announced are in full production, so we're expecting a lot.
Yields are good. ... And this is now a year behind when the first 16-nanometer FinFET products went into production in TSMC. They have yields under great control.