Build list legend
|Version of Microsoft Windows|
|OS family||Windows NT|
2026-10-13 (with Extended Security Updates)
|Windows Server 2012|
|Windows Server 2016|
Windows Server 2012 R2 is the server counterpart of Windows 8.1. It reached RTM on 27 August 2013 and was released on 18 October of that year. It replaces Windows Server 2012 and was replaced by Windows Server 2016.
This is the first version of Windows Server to drop support for processors without the CMPXCHG16b, PrefetchW and LAHF/SAHF instructions. It is the last version to support upgrade paths to Windows Server 2016 and also the last version to support upgrade paths from Windows Server 2008 R2.
There are four editions of this operating system: Essentials, Foundation, Standard and Datacenter. As with Windows Server 2012, the Datacenter and Standard editions are feature identical, varying only based on licensing (particularly licensing of Hyper-V VMs). The Essentials edition has the same features as the Datacenter and Standard products, with some restrictions.
Windows Server 2012 R2 is officially compatible with Intel processors up to Skylake (6th Generation). On Kaby Lake (7th Generation) up to Coffee Lake (8th/9th Generation), Server 2012 R2 is not supported due to a lack of Windows Update and Intel Graphics, however, hacks have been made to get both working. For Ice Lake (10th Generation) up to Alder Lake (12th Generation), no known hacks have appeared for Intel Graphics, but the chipset drivers for Ice Lake, Tiger Lake (11th Generation), and Alder Lake have been confirmed to install without any issues.