There are no Ivy Bridge Xeons!
Ivy Bridge Xeons are not expected until Q4 2012 or Q1 2012.
Sounds like Mac Pros still haven't caught up with Sandy Bridge technology which would be the 20-40% gain.
I would like an cheaper redesigned MacPro with Ivy now!
You may actually get this in some way, as the naming scheme for the Xeons is a little misleading. Unlike the clear differentiation in the consumer world the Xeon CPU's are not as distinct "Sandy Bridge" as their i5/i7 cousins. Hellhammer posted a link to an article some weeks ago which showed that the Sandy Bridge Xeons would contain some features which are associated with Ivy Bridge in the consumer world (core i5/i7).
Regarding the question whether Apple could / would switch to i7 CPU's in the MacPro (and have a cost advantage of it):
- We don't know anything about their individual discounts for the respective components, so judging by simply comparing end-user prices does not help imho.
- They might leverage economies of scale by using the same CPU in both iMacs and MacPro, but with a twist:
Common understanding is that due to the lack of a 2nd QPI channel the core i7 CPU's would not allow for multi-CPU configurations. As MacPro-style number crunching usually scales well with the number of available cores, Apple could design a custom motherboard with a second (or third/fourth) CPU running separately (perhaps with a barebone OSX or even iOS), only being available for calculation operations. Something like XGrid set up in hardware on the same motherboard and (e.g. via Grand Central Dispatch) being transparently available as system resource for any multithreaded program able to make use of more cores.
That way they could not only span the range from entry-level tower (using a "normal" iMac CPU and inexpensive helper processors like e.g. ARM CPU's, which they would be able to purchase at a very low price due to the sheer number of iOS devices) over midrange (core i5/i7) up to high-end (only Xeons as both main and helper CPU's - potentially also offering 4-CPU configurations with up to 24 "real" cores for the die-hard number crunchers that don't mind a high bill).
Yes i know - i'm probably dreaming. But i wouldn't really mind Apple doing some revolutionary-type of product again (only this time in the Macintosh world instead of the iOS sphere). The bits and pieces are mostly there already - now Apple would "only" need to put them in the right place...