Microsoft has published an overview on Windows 2012′s Editions and Licensing.
If you take a look at the different editions you will find two “main” editions, Standard and Datacenter. The main different lays in the virtualization rights. Where the Standard edition covers two virtual instances and unlimited for Datacenter. The VMs are entitled to run on up to two processors for both editions.
|Edition||Ideal for…||High Level Feature|
Open NL (US$)
private & hybrid
|Processor + CAL*||$4,809**|
|Standard||Low density or non-|
with two virtual
|Processor + CAL*||$882**|
cloud based services; no
|Server (25 User|
|Server (15 User|