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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 ?
APEX runs many of its BI applications on 64-bit Intel Itanium architecture.
QlikTech to Demo QlikView 64 on Intel Itanium 2 at TechEd Amsterdam June 29th
Chip maker Intel Corp has released its IA-32 Execution Layer software for use in systems featuring the Intel Itanium 2 processor and a Microsoft Windows operating system.
A DIFFERENT SOFT OF 64-Bitness Hewlett-Packard (HP; Fort Collins, CO) is covering all bases by providing workstations running on 32-bit Intel Xeon and Pentium 4 processors, 64-bit Intel Itanium 2, and HP's own 64-bit PA-RISC processors.
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The Intel Itanium 2 64-bit chips are designed for use in servers that handle real-time financial transactions, manage large databases and perform complex scientific tasks, according to the company.
The site provides developers with the crucial information and resources they need to deploy applications for the Intel Itanium processor, Intel's first-generation 64-bit processor for high-end servers and workstations.
This support for Intel Itanium architecture is expected to increase the availability of Java-based software and broaden solutions choices for end users.
Silicon Graphics (NYSE: SGI) with NASA today confirmed that NASA's new Intel Itanium 2 processor-based Columbia supercomputer is the most powerful computer in the world.
The Intel Itanium 2 processor is reportedly able to deliver 1.
24, we are advised by the client that the first graph, second sentence should read "The Intel Itanium processor, formerly known by the code name Merced, employs a 64 bit architecture to greatly increase the performance of demanding visualization operations" rather than "The Intel Itanium processor, formerly known by the code name Merced, employs a 64 bit architecture and enhanced instruction handling to greatly increase the performance of demanding e-Business, visualization, computation and multimedia operations" The second graph should read "'Intel's Itanium processor can provide exactly what we have been waiting for,' said Roman Ormandy, president and CEO of Caligari Corporation.