POWER4 microarchitecture

E826847

The POWER4 microarchitecture is IBM’s high-performance 64-bit RISC processor design that introduced multi-core server CPUs and formed the basis for later PowerPC and POWER family chips.

All labels observed (2)

Label Occurrences
POWER4 microarchitecture canonical 2
POWER4 architecture 1

How this entity was disambiguated

Statements (46)

Predicate Object
instanceOf IBM POWER architecture
microarchitecture
addressSpace 64-bit virtual address space
architectureFamily POWER
PowerPC
architectureType RISC
bitWidth 64-bit
branchPrediction dynamic branch prediction
cacheHierarchy multi-level cache
clockFrequencyRange 1.0–1.9 GHz
coreCountPerDie 2
designer IBM
endianSupport big-endian
executionModel out-of-order execution
family IBM POWER4 family
firstImplementedIn IBM POWER4
floatingPointUnit integrated high-performance FPU
floatingPointUnitCount multiple FP execution units
influenced POWER5 microarchitecture
linked to: POWER5

later IBM PowerPC server processors
instructionSetArchitecture PowerPC ISA
linked to: PowerPC
integerUnit multiple integer execution units
introductionYear 2001
L2Cache on-chip L2 cache
L3Cache off-chip L3 cache support
marketPosition high-end
notableContribution early commercial multi-core server CPU design
notableFeature designed for high-performance servers
integrated two processor cores on a single die
introduced dual-core server processors for IBM POWER line
pipelineType superscalar
powerManagement server-oriented power and thermal design
predecessor POWER3 microarchitecture
primaryUse commercial and technical computing workloads
datacenter workloads
processTechnology 180 nm CMOS
simultaneousMultithreading not supported
succeededBy POWER5 microarchitecture
linked to: POWER5
supports hardware partitioning in server systems
symmetric multiprocessing
targetMarket enterprise servers
high-end UNIX servers
usedIn IBM RS/6000 servers
linked to: IBM RS/6000 systems

IBM pSeries servers
linked to: IBM RS/6000 systems
vendor IBM
virtualMemorySupport yes

How these facts were elicited

Referenced by (3)

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

PowerPC G5 basedOn POWER4 microarchitecture
POWER Architecture, first generation ancestorOf POWER4 architecture
linked to: POWER4 microarchitecture
POWER4 microarchitecture POWER4 microarchitecture