Starting to think that the highest end first generation big Kepler will have fused off parts, just like with gtx480. Not entirely because of manufacturing problems, but simply to maximize yields and sales - Nvidia has stated that the demand in the professional space is expected to outstrip all of their previous generation tesla lines COMBINED. For that reason, I think Nvidia will be getting big Kepler out sooner than they internally anticipated, and will respin/retweak big K to release fully unlocked chips for second gen Kepler tesla cards and the gtx700 line.