: The server version of Windows 7, built on the NT 6.1 codebase.
: This version drops support for 32-bit processors, optimized specifically for x64 hardware to handle larger RAM capacities (up to 2 TB in Datacenter/Enterprise editions). Service Pack 1 (SP1) Improvements : Includes major enhancements like Dynamic Memory windows server 2008 r2 sp1 x64 esd enus jan 20 full
A Hyper-V enhancement that allowed virtual machines to dynamically adjust their RAM based on workload requirements, significantly increasing server consolidation ratios. : The server version of Windows 7, built on the NT 6
: Allows administrators to specify exactly which programs are allowed to run on a user's machine, significantly hardening the system against unauthorized software. Management & Web Capabilities Windows Server 2008 R2 | Specs, reviews and EoL info : Allows administrators to specify exactly which programs
Includes previously released updates and introduces key features like Dynamic Memory for Hyper-V and Microsoft RemoteFX .
: SP1 bundled all previously released security and performance fixes into a single package. Deciphering the Search String Windows Server 2008 R2 - Microsoft Lifecycle
Windows Server 2008 R2 was a landmark release as the first Microsoft server OS to drop 32-bit (x86) processor support entirely.