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POWER8 - Microarchitectures - IBM
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POWER8 µarch
General Info
Arch TypeCPU
DesignerIBM
ManufacturerIBM
IntroductionAugust, 2013
Phase-outJune, 2014
Process22 nm
Core Configs4, 6, 8, 10, 12
Pipeline
TypeSuperscalar
SpeculativeYes
Reg RenamingYes
Stages15-23
Cache
L1I Cache32 KiB/core
8-way set associative
L1D Cache64 KiB/core
8-way set associative
L2 Cache512 KiB/core
L3 Cache8 MiB/core
L4 Cache128 MiB/chip
Succession

POWER8 is the Power microarchitecture for IBM's family of POWER8 processors that was introduced in 2014. POWER8 is the successor to POWER7+.

Architectures[edit]

Key changes from POWER7/+[edit]

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Die[edit]

Dodeca-Core[edit]

power8 die shot (12-core).png


power8 die shot (12-core)(annotated).png

Hexa-Core[edit]

 ?die shot?
power8 die shot (6-core)(annotated).png
codenamePOWER8 +
core count4 +, 6 +, 8 +, 10 + and 12 +
designerIBM +
first launchedAugust 2013 +
full page nameibm/microarchitectures/power8 +
instance ofmicroarchitecture +
manufacturerIBM +
microarchitecture typeCPU +
namePOWER8 +
phase-outJune 2014 +
pipeline stages (max)23 +
pipeline stages (min)15 +
process22 nm (0.022 μm, 2.2e-5 mm) +