According to the journalist AppleByte , Brian Tong, who gets his information from reliable sources, the new iMacs are already en route to the U.S. via the sea outlet would be scheduled for the last week of April or first week of May. The new iMac would retain the same chassis and adopt Intel’s Sandy Bridge, which recently made their appearance in the MacBook Pro.
On the iMac 27-inch high-end, we should logically find an Intel Core i5-2400 with four cores clocked at 3.1 GHz 2.8 GHz cons now, and an optional Core i7-2600 with four cores clocked at 3.4 GHz, whereas currently the maximum frequency is 2.93 GHz. The Sandy Bridge architecture is more efficient, the difference between the two machines should be important.
Intel has only a single Intel Dual Core Sandy Bridge to its catalog, the i5-2390T clocked at 2.7 GHz and it is possible that Apple opts for Quad Core processors over the entire iMac line.
Concerning the graphics, Apple should continue to adopt solutions from AMD in Round 6 as it did with the MacBook Pro. Finally, the new iMac of course inherit the new connectors Thunderbolt. This connector will make the iMac a serious competitor to the Mac Pro.
It already is in terms of performance, but the contribution of the Thunderbolt can provide bandwidth to external devices hitherto inaccessible.