Microsoft Windows Server 2003 R2a Enterprise x64 Edition w/25 Clients

Features

Enterprise capabilities---Get all the functionality you expect from a server operating system, including multiprocessor support, server clustering, and other improvements.

Robust security---Protect your network with the advanced security features of Service Pack 1. Use the Security Configuration Wizard to create security policies based on a server role. Implement other features to protect against malicious code and activate security updates at installation.

Increased operational efficiency through virtualization---Run up to four instances of the server software in virtual operating system environments.

Better identity and access management across security boundaries---Active Directory Federation Services (ADFS) provides improved total cost of ownership (TCO) and better security when collaborating with partners or deploying internet-facing web applications.

Efficient information sharing and storage management---Increase your team ability to work together by using SharePoint sites to communicate and exchange information. Easily configure and provision storage area networks.

Windows Server 2003 R2 Enterprise, x64 Edition, supports up to 1 TB of RAM on 1- to 8-way servers. Supported processors include

AMD Opteron , AMD Athlon 64

Intel Xeon with Intel EM64T , Intel Pentium with Intel EM64T

Minimum System Requirements

Minimum CPU - x64 architecture-based computer with Intel 64-bit Xeon, 64-bit Pentium, AMD Opteron, AMD Athlon 64, or compatible processor (Windows Server 2003 R2 Enterprise x64 Edition, supports up to eight CPUs on one server).

Minimum RAM - 512 MB

Multiprocessor Support - Up to 8

Minimum Disk Space for Setup - 4 GB