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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
References in periodicals archive ?
Intel and Itanium are registered trademarks of Intel Corporation.
Most recently, the two companies brought SAS9 to the Linux 64-bit operating system on the Intel Itanium 2 processor.
Assuming the same applications on both platforms, users won't notice much difference when migrating from HP-UX on HP PA-RISC to HP-UX on Intel Itanium 2, says Dan Nordhues, HP's Director of Product Marketing for PA-RISC and Itanium Workstations.
While AMD has announced numerous development deals with Linux OEMs (SuSe, RedHat, UnitedLinux) to tune that operating system for Opteron, development on porting Linux to Itanium by anyone other that Intel seems to be waning; even IBM has scaled back its Linux-on-Itanium development efforts.
Itanium is a registered trademark of Intel Corporation.
The high-performance NEC Express5800/1320Xe server, with eight Intel Itanium 2 processors, 1.
The real kicker is that, as with all 64-bit chips, Itanium can address huge amounts of memory: currently 16 terabytes of flat virtual address space--about 4,000 times more random--access memory (RAM) than in existing Intel x86 chips.
The launch of the Solutions Guide continues the momentum generated by recent Alliance and Itanium milestones, including significant increases in Alliance membership, expansion of supporting applications and the growth of Itanium-based system sales worldwide.
The collaboration with charter member Red Hat comes as the Itanium Solutions Alliance reaches its two year anniversary.
TotalView is designed for such environments, particularly when parallelism is employed and in situations where developers are taking applications from 32-bit systems to larger, faster 64-bit systems such as those based on the Itanium 2 processor.
Itanium-based solutions have shown strong market opportunity and solution support in recent years, spurred by a $10 billion joint investment announced by the Itanium Solutions Alliance Founding Sponsors in January 2006 and the release of the Dual-Core Intel Itanium 2 processor 9000 series in July 2006.
The results show that for large business intelligence solutions, the combination of the Unisys ES7000, Intel Itanium 2 processors and Microsoft software delivers mainframe-class performance and scalability without the cost and complexities of proprietary UNIX-based systems.