Itanium

E190924

Itanium is a 64-bit server processor architecture developed by Intel (with early collaboration from HP) that was designed for high-end enterprise and technical computing but ultimately saw limited adoption and was discontinued.

All labels observed (8)

How this entity was disambiguated

Statements (75)

Predicate Object
instanceOf 64-bit instruction set architecture
microprocessor architecture
adoptionLevel limited adoption
alternativeName IA-64
linked to: Itanium
architectureType EPIC
backwardCompatibility not binary compatible with x86
not binary compatible with x86-64
bitWidth 64-bit
competitionFrom AMD Opteron
IBM POWER
linked to: IBM Power Systems

Intel Xeon
SPARC
x86-64
designGoal explicit parallelism in instruction encoding
high instruction-level parallelism
reliability and availability
scalability for large multiprocessor systems
support for very large memory
developer Hewlett-Packard
Intel
linked to: Intel Corporation
discontinuationStatus discontinued
emulationSupport x86 code via software emulation
endianSupport big-endian
little-endian
finalGeneration Kittson
finalShipmentsEnded 2021
firstCommercialCPU Itanium (Merced)
linked to: Itanium
firstCommercialReleaseYear 2001
fullName Intel Itanium architecture
linked to: Itanium
initialCodename Merced
intendedUse enterprise resource planning
high-performance computing
large-scale databases
mainframe-class workloads
keyFeature advanced branch prediction mechanisms
explicitly encoded instruction parallelism
hardware support for reliability, availability, and serviceability
large register files
predication support
speculative loads
very long instruction word bundles
laterCodename Kittson
Madison
Montecito
Montvale
Poulson
Tukwila
legacy example of commercially unsuccessful high-risk ISA transition
influenced research and design in EPIC and ILP architectures
manufacturingProcess CMOS
marketOutcome commercial disappointment
operatingSystemSupport HP-UX
Linux distributions
NonStop OS
OpenVMS
Windows Server (selected versions)
linked to: Windows Server
primaryVendorSystem HP Integrity servers
HP Superdome servers
reasonForLimitedAdoption high platform and porting costs
lack of backward compatibility with x86
narrow software ecosystem
strong competition from x86-64 servers
registerType branch registers
floating-point registers
general-purpose registers
predicate registers
strategicRole Intel attempt to replace x86 in high-end servers
successorCodename McKinley
successorMicroarchitecture Itanium 2
linked to: Itanium
targetMarket high-end enterprise computing
mission-critical systems
servers
technical computing
vendorLockIn primarily used in HP systems
wordSize 64 bits

How these facts were elicited

Referenced by (17)

Full triples — surface form annotated when it differs from this entity's canonical label.

Windows XP platform Itanium
HP-UX supportsArchitecture Itanium
x86 influenced IA-64
linked to: Itanium
Intel processors productLineIncludes Intel Itanium
linked to: Itanium
Windows Server 2003 platform Itanium
Itanium fullName Intel Itanium architecture
linked to: Itanium
Itanium alternativeName IA-64
linked to: Itanium
Itanium firstCommercialCPU Itanium (Merced)
linked to: Itanium
Itanium successorMicroarchitecture Itanium 2
linked to: Itanium
Windows Server 2008 platform Itanium
Windows Server 2008 edition Itanium-Based Systems Edition
linked to: Itanium
VMS runsOn Itanium
HP PA-RISC successor Intel Itanium
linked to: Itanium
libunwind supports Itanium architecture
linked to: Itanium
GNU As supportsTarget IA-64
linked to: Itanium
UEFI compatibleWith Itanium architecture
linked to: Itanium