Intel's will mark the transition Sandy Bridge E Architecture to the server space in the form of Xeon E5 series CPU In the first quarter of 2012. The new Xeon chips E5 is also known also by the code name Sandy Bridge-EP and has some extra features when compared with desktop series.
This series has up to eight processor cores, which can run a maximum of sixteen with Intel Hyper-Threading technology, up to 20MB L3 cache memory, as well as the presence Dual QuickPath Interconnect (QPI) link. New features are also added to the list of specifications to support multi-socket systems, because it provides the chip with a high bandwidth inter-socket communication interface.
Just like their desktop counterparts, the CPU Xeon E5 also features quad-channel DDR3 controller built-in, but this time the maximum amount of memory that can be handled by each processor increased to 384GB, providing a total of 768GB of memory for dual-socket systems .
There are some details on the Xeon E5-chip series, from TechPowerUp site, and estimate of performance for this chip when compared to the Xeon X5690.
Improved performance of Xeon E5-2600 series coming varied between 50 and 120 percent compared to previous versions of Westmere-EP, depending on the task is run
These chips release date has not been mentioned, but intel says they have recently been sent some samples Xeon E5 to a number of cloud and HPC computer vendor, and is expected to be available in Q1 2012.