DEC Alpha 21264

E443300
64-bit RISC microprocessor Alpha processor microprocessor

The DEC Alpha 21264 is a high-performance 64-bit RISC microprocessor from Digital Equipment Corporation’s Alpha family, designed for advanced server and workstation applications in the late 1990s.

Try in SPARQL Jump to: Surface forms Statements Referenced by

Observed surface forms (2)

Surface form Occurrences
Alpha 21264 1
DEC Alpha 21364 1

Statements (45)

Predicate Object
instanceOf 64-bit RISC microprocessor ⓘ
Alpha processor ⓘ
microprocessor ⓘ
addressSpace 64-bit virtual address space ⓘ
alsoKnownAs Alpha 21264 NERFINISHED ⓘ
EV6 NERFINISHED ⓘ
architecture RISC ⓘ
branchPrediction advanced branch prediction ⓘ
clockFrequency 500 MHz (initial versions) ⓘ
up to around 750 MHz (later versions) ⓘ
company Digital Equipment Corporation NERFINISHED ⓘ
companyAcquisitionContext Digital Equipment Corporation later acquired by Compaq NERFINISHED ⓘ
designedFor servers ⓘ
workstations ⓘ
designGoal maximize single-thread performance ⓘ
endianSupport little-endian ⓘ
executionType out-of-order execution ⓘ
family DEC Alpha family NERFINISHED ⓘ
floatingPointStandard IEEE 754 compatible ⓘ
floatingPointUnit integrated FPU ⓘ
floatingPointUnits multiple floating-point execution units ⓘ
integerUnits multiple integer execution units ⓘ
introductionYear 1998 ⓘ
ISA DEC Alpha NERFINISHED ⓘ
issueWidth 4-way superscalar ⓘ
L1Cache 64 KB data cache ⓘ
64 KB instruction cache ⓘ
L2CacheSupport external L2 cache ⓘ
manufacturer Digital Equipment Corporation NERFINISHED ⓘ
notableFeature aggressive out-of-order execution core ⓘ
high instruction-level parallelism ⓘ
large on-chip L1 caches for its time ⓘ
pipelineType superscalar ⓘ
powerSupplyInterface external L2 cache interface ⓘ
predecessor DEC Alpha 21164 ⓘ
processTechnology 0.35 µm CMOS (initial) ⓘ
registerFile 32 floating-point registers ⓘ
32 integer registers ⓘ
successor DEC Alpha 21364 NERFINISHED ⓘ
targetMarket enterprise servers ⓘ
high-performance computing ⓘ
technical workstations ⓘ
usedIn Digital AlphaServer systems NERFINISHED ⓘ
Digital/Compaq AlphaStation workstations NERFINISHED ⓘ
wordSize 64-bit ⓘ

Referenced by (3)

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

DEC Alpha servers → basedOnProcessorFamily → DEC Alpha 21264 ⓘ
DEC Alpha servers → basedOnProcessorFamily → DEC Alpha 21264 ⓘ
this entity surface form: DEC Alpha 21364
Alpha architecture → notableImplementation → DEC Alpha 21264 ⓘ
this entity surface form: Alpha 21264