The inclusion of three distinct architectures in one package was a strategic move by Microsoft to ensure maximum compatibility:
Windows Server 2003 SP2, Windows Server 2008/R2, and Windows XP SP3/Vista/7 for development. En Sql Server 2008 R2 Standard X86 X64 Ia64 Dvd 521546
If you see this DVD today, the IA64 folder is essentially a historical artifact. Itanium systems (HP Integrity servers) running SQL Server 2008 R2 are now well past extended support (which ended July 9, 2019). For compliance, any business still running that combination is operating on borrowed time. The inclusion of three distinct architectures in one
If you still have a physical DVD labeled 521546 , verify your licensing. The "Standard" edition keys for x86 will not unlock x64 binaries, and vice versa. Always use the correct architecture binaries for your installed OS. Windows Server 2008/R2