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A CPU family from Intel designed to supersede Intel's x86-based servers. Although an advanced hardware architecture, and even with HP as its major supporter, Itanium gained only a fraction of the server market dominated by the x86 line. In addition, the compilers necessary to take full advantage of Itanium's elaborate architecture were never fully developed. By the time Itanium gained ground in the early 2000s, there were too many x86 servers running worldwide, and x86 performance was improving.

HP-UX (HP's Unix) and several other Unix versions run on Itanium; however, in the 2010 time frame, the Itanium versions of Windows Server, Red Hat Linux and Ubuntu Linux were given end of life.

x86 Kept Advancing
After 64-bit Itanium chips were introduced in 2001, Intel upgraded its x86 CPUs to 64 bits, and over the years added advanced security and fault detection features into high-end x86 Xeon chips. See Intel 64 and Xeon.

Native, x86 and HP PA-RISC Apps
Itaniums run native applications and emulate x86 and HP PA-RISC apps. x86 programs are executed in hardware or in software (see IA-32 Execution Layer). HP PA-RISC apps are translated in software (see Aries). For more on the Itanium architecture, see IA-64.

 Model           Process  Max.  Year   Tech.  Clock  Max.Code Name  Intro  (nm)   Speed  CoresItanium
 Merced     2001   180  800 MHz   1

 Itanium 2
 McKinley   2002   180  1.0 GHz   1
 Madison    2003   130  1.6 GHz   1
 Deerfield  2003   130  1.0 GHz   1
 Hondo      2004   130  1.1 GHz   1
 Fanwood    2004   130  1.6 GHz   1
 Madison    2004   130  1.7 GHz   1

 Montecito  2006    90  1.6 GHz   2
 Montvale   2007    90  1.7 GHz   2

 Itanium 9300
 Tukwila    2010    65  1.7 GHz   4

 Itanium 9500
 Poulson    2013    32  2.5 GHz   8
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References in periodicals archive ?
One or two dual-core Intel Itanium 2 processor may be installed running at up to 1.6 GHz each, with up to 96GB of RAM and up to eight 2.5-inch hot-pluggable SAS SCSI drives, in a compact, internally expandable 4U EIA enclosure.
The architecture is based on HP Integrity Superdome servers running HP-UX 11i on new Dual-Core Intel Itanium 2 9000 Series processors.
Tokyo, Japan, July 24, 2006 - (JCN) - Hitachi has developed a hardware-based server virtualization system and will implement it on a new server module based on Intel's Itanium 2 Processor 9000 Series dual-core processors.
The PRIMEQUEST 500 series servers incorporate Dual-Core Intel Itanium 2 processors, eXtended PARtitioning (XPAR) capabilities and Intel Virtualization Technology.
Some specific topics addressed include compiler analysis for trace-level speculative multithreaded architectures, data speculation use on the Intel Itanium 2 processor, hybrid compiler and microarchitecture techniques for cache traffic optimization, a tile size selection analysis for blocked array layouts, cooperative caching with Keep-Me and Evict-Me, and automatic low overhead program instrumentation with the LOPI framework.
Arkeia hot backup plug-in includes numerous Linux distributions on Intel x86, Itanium 2, Sparc, PowerPC and Alpha architectures as well as Windows, AIX, Solaris, HP-UX on PA-RISC, Tru64, Irix, Mac OS X and xBSDs.
Back in March 2003, Bull announced the NovaScale 4040, 5080, and 5160 servers, which support 4, 8, and 16 of Intel Corp's Itanium 2 processors.
Supported by HP's most advanced Itanium 2 platforms, university faculty will be able to tap into a wealth of computing power and open doors to new ways of teaching that can significantly enhance the learning experience for students.
TimesTen, Inc., Mountain View, Calif., a provider of infrastructure software for real-time event processing, has introduced TimesTen version 5 for Intel Itanium 2 processor- based servers running the Red Hat Enterprise Linux AS operating system.