: The original R2 version was released in December 2005, followed by the definitive SP2 update on March 13, 2007. End of Life : Extended support for all versions officially ended on July 14, 2015 ISO Download & Media Resources
: 32-bit versions support up to 32 GB of RAM (via PAE), while 64-bit editions support up to 128 GB. Release Dates windows server 2003 r2 enterprise sp2 -32 64 bit- iso
: Available in both 32-bit (x86) and 64-bit (x64/Itanium) versions. Memory Support : The original R2 version was released in
Windows Server 2003 R2 Enterprise Edition with Service Pack 2 (SP2) is a legacy server operating system based on the NT 5.2 kernel Memory Support Windows Server 2003 R2 Enterprise Edition
Because this software is no longer officially sold or supported, the ISO files are primarily available via community archives and the Microsoft Download Center for the service pack update itself. Windows Server 2003 R2 | Specs, reviews and EoL info