"Can Zen make that $1700 price tag on the Broadwell-E 6950X seem even more ludicrous? Yes."
"Press was told of a handful of high level changes to the new architecture as well. Branch prediction gets a complete overhaul. This marks the first AMD processor to have a micro-op cache. Wider execution width with broader instruction schedulers are integrated, all of which adds up to much higher instruction level parallelism to improve single threaded performance."
"The IPC of Zen is on-par or better than Broadwell.
Zen will scale higher than 3.0 GHz in 8-core configurations."
http://www.pcper.com/reviews/Processors/AMD-Zen-Architecture-and-Performance-Preview