Microsoft released the updating licensing details for WS R2 several weeks ago. Remember that once released, you will be buying WS R2, even if you plan to downgrade to W R2. As with WS, the two editions are identical technically, having the same scalability and features … except one. Processors Both the Standard How Much Is Windows Server 2012 R2 Standard Datacenter edition cover a licensed server for 2 processors. Processors are CPUs or sockets. Cores are not processors. A server with 2 Intel Xeon E5 processors with 10 cores each has 2 processors. It requires one Window Server license. It needs 2 Windows Server licenses. This applies no matter what downgraded version you plan to install.