Some slides posted here (don't know original source):
http://forum.beyond3d.com/showpost.p...postcount=3065

Seems Barts is after GTX460 with higher performance and lower power draw. Cayman seems to be a beast when looking at the Vantage score* and power consumption figures posted in those slides. Wonder how they're going to manage producing Antilles with Cayman x2.

*if accurate