The 2012-era chassis gets some 2013-era internals



From ArsTechnica:

Just a day after announcing its iPhone launch numbers, Apple is updating its iMac lineup. Last year's all new iMac was an impressive performer and quite the looker, and an update to Haswell was expected at some point this year. Pixel density enthusiasts may be disappointed to learn that there wasn't a move to a higher density display at either the 21.5-inch or 27-inch SKUs. Thankfully, pricing hasn't changed, so the base model retains its $1,299 sticker, while the 27-inch model starts at $1,799. That's not to say nothing's changed. So what's new?

Right off the bat is the addition of Intel's new Haswell processors, with the base 21.5-inch model most likely sporting the quad-core Core i5-4570R (2.7GHz base clock, turbo up to 3.2GHz with Iris Pro graphics), and the top of the line 27-inch SKU bringing what is likely the Core i7-4771 (3.5GHz base clock, turbo up to 3.9GHz). The upgrade is quite welcome and brings the iMac family CPUs into the present generation. However, as in the recently updated MacBook Airs, Haswell isn't likely to drive performance to much greater heights than the prior generation's similarly clocked Ivy Bridge processors.

  Apple updates iMacs: Haswell, PCIe SSD, and 802.11ac