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Alpha 21464 - Microarchitectures - Compaq

Edit Values
Alpha 21464 µarch
General Info
Arch TypeCPU
DesignerCompaq
ManufacturerIBM
Process0.13 µm
Core Configs1
Pipeline
TypeSuperscalar
OoOEYes
SpeculativeYes
Reg RenamingYes
Stages8
Decode8-way
Instructions
ISAAlpha
Cache
L1I Cache64 KiB/core
4-way set associative
L1D Cache64 KiB/core
4-way set associative
L2 Cache3 MiB/core
6-way set associative
Succession

Alpha 21464 was an ambitious Alpha microarchitecture designed by Compaq as a successor to the Alpha 21364 set to be introduced in 2004. The project was cancelled in June 2001 when Compaq announced their commitment to Intel's Itanium.

History

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Process Technology

See also: 0.13 µm process
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Architecture

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Area comparison

In a talk by Joel Emer, it was stated that, at ISO process, the 21464 is roughly 4.5 times larger than the 21264 and is over 6 times larger than the original 21064.

Die

  • 1.2 GHz - 2 GHz @ ~1.2 V
  • 0.13 µm process
  • ~250,000,000 transistors
  • ~420 mm² die size
  • PGA-??? package
    • ~1100 signal pins

Floorplan was done but the design never made it to fabrication.

Alpha 21464 die floorplan.png

Documents

References

  • Seznec, André, et al. "Design tradeoffs for the Alpha EV8 conditional branch predictor." Computer Architecture, 2002. Proceedings. 29th Annual International Symposium on. IEEE, 2002.
codenameAlpha 21464 +
core count1 +
designerCompaq +
full page namecompaq/microarchitectures/alpha 21464 +
instance ofmicroarchitecture +
instruction set architectureAlpha +
manufacturerIBM +
microarchitecture typeCPU +
nameAlpha 21464 +
pipeline stages8 +
process130 nm (0.13 μm, 1.3e-4 mm) +