One can generally expect yields to be lower early in a new process or node. However, at any point in time, if yields are lower than expected, it says something about your ability to make realistic projections. Fermi also appeared to suffer from overly optimistic expectations. Is there a trend here?
nVidia is in production right now. That's the reason why they guided their margin down. It's affect their financial business not their ramping process. They have build inventory over q4 with Kepler chips. They are shipping them for revenue in this quarter.
BTW: Fermi has better yields than they expected:
http://seekingalpha.com/article/205057-nvidia-q1-2011-earnings-call-transcript?part=qandaDavid White
Yes. Kevin, I think in the prior comments, and in the CFO commentary, we'd explained it really is associated primarily with GTX 470 and GTX 480. We ramped that product. We were favorably surprised with nicer yields than what we anticipated.