Overview:

Windows Server 2008 R2 Enterprise is an advanced server platform that provides more cost-effective and reliable support for mission-critical workloads.
It offers innovative features for virtualization, power savings, and manageability and helps make it easier for mobile workers to access company resources.

Description:
Windows Server 2008 R2 builds on the award-winning foundation of Windows Server 2008, expanding existing technology and adding new features to enable IT professionals to increase the reliability and flexibility of their server infrastructures. New virtualization tools, Web resources, management enhancements, and exciting Windows 7 integration help save time, reduce costs, and provide a platform for a dynamic and efficiently managed data center. Powerful tools such as Internet Information Services (IIS) version 7.5, updated Server Manager and Hyper-V platforms and Windows PowerShell version 2.0 combine to give customers greater control, increased efficiency and the ability to react to front-line business needs faster than ever before.
Windows Server 2008 R2 is the most advanced Windows Server operating system yet, designed to power the next-generation of networks, applications, and Web services. With Windows Server 2008 R2 you can develop, deliver, and manage rich user experiences and applications, provide a highly secure network infrastructure, and increase technological efficiency and value within your organization. Please note that the new R2 version does not support 32-bit (x86) processors. IA64 or x64 architecture is required.
Windows Server 2008 R2 builds on the success and strengths of its Windows Server predecessors while delivering valuable new functionality and powerful improvements to the base operating system. New Web tools, virtualization technologies, security enhancements, and management utilities help save time, reduce costs, and provide a solid foundation for your information technology (IT) infrastructure.

System requirements:

Processor: Minimum: 1.4 GHz (x64 processor)

Memory: Minimum: 512 MB RAM

Maximum: 2 TB (Enterprise)

Disk Space Requirements: Minimum: 32 GB or greater

Note: Computers with more than 16 GB of RAM will require more disk space for paging, hibernation, and dump files

Display: Super VGA (800 × 600) or higher resolution monitor

Other: DVD Drive, Keyboard and Microsoft Mouse, Internet access.