Microsoft announced it will phase out support for Intel's Itanium architecture. The software giant wrote on its Windows Server blog that Windows Server 2008 R2 will be its last operating system to support IA64.
Current support for Itanium remains unchanged. Each of these products represent the state of the art of their respective product lines. Each fully support Itanium, support the recently-released Itanium 9300 (“Tukwila”) processor, and Microsoft’s support for these products will continue – following the Microsoft Support Lifecycle Policy. Mainstream support for Windows Server 2008 for Itanium-Based Systems (and R2) will end, in accordance with that policy, on July 9, 2013, while extended support will continue until July 10, 2018. That’s 8 more years of support.
Why the change? The natural evolution of the x86 64-bit (“x64”) architecture has led to the creation of processors and servers which deliver the scalability and reliability needed for today’s “mission-critical” workloads. Just this week, both Intel and AMD have released new high core-count processors, and servers with 8 or more x64 processors have now been announced by a full dozen server manufacturers. Such servers contain 64 to 96 processor cores, with more on the horizon.