Win Server 2008 R2 Enterprise OEM Pack 1-4 cpu standard 5 CLT Full Version 64bit Editions Compared to its predecessor, most editions of Windows Server 2008 are available in x86-64 and IA-32 versions. These editions come in two DVDs: One for installing the IA-32 variant and the other for x64. Windows Server 2008 for Itanium-based Systems supports IA-64 processors. Microsoft has optimized the IA-64 version for high-workload scenarios like database servers and Line of Business