Editing dec/microarchitectures/alpha 21264

{{dec title|Alpha 21264|arch}}
{{microarchitecture
|atype=CPU
|name=Alpha 21264
|designer=DEC
|manufacturer=DEC
|manufacturer 2=Intel
|manufacturer 3=Samsung
|introduction=February, 1998
|process=0.35 µm
|cores=1
|type=Superscalar
|oooe=Yes
|speculative=Yes
|renaming=Yes
|stages=6
|decode=4-way
|isa=Alpha
|l1i=64 KiB
|l1i per=core
|l1i desc=2-way set associative
|l1d=64 KiB
|l1d per=core
|l1d desc=2-way set associative
|predecessor=Alpha 21164
|predecessor link=dec/microarchitectures/alpha_21164
|successor=Alpha 21364
|successor link=compaq/microarchitectures/alpha_21364
}}
'''Alpha 21264''' was an [[Alpha]] microarchitecture designed by [[DEC]] and introduced in 1998 by [[Compaq]] as a successor to the {{\\|Alpha 21164}} architecture.

== History ==
{{empty section}}

== Process Technology ==
{{see also|0.35 µm process}}
Alpha 21264 was manufactured on a [[0.35 µm process]] at DEC's own Hudson foundry. The process had a 0.35 µm drawn gate length and 0.25 µm effective channel length. The CMOS process had 3 metal layers and allowed for a supply voltage limited to 2 V in order to limit the chips to a power limit of 72 W, although it was actually designed to reliably operate at up to 2.5 V.

== Architecture ==
{{empty section}}
* Integrated PLL (designed by [[Swiss Center for Electronics and Microtechnology|CSEM]])
== Die ==
* 15,200,000 transistors
** 9,200,000 cache
** 6,000,000 logic
* [[0.35 µm]] 4 metal layers
* 16.7 mm x 18.8 mm
* 313.96 mm² die size
* PGA-587 package
** 389 signal pins


: [[File:alpha 21264 die shot.png|650px]]


: [[File:alpha 21264 die shot (annotated).png|650px]]

== All Alpha 21264 chips ==
{{empty section}}

== References ==
* Dobberpuhl, Daniel W. "Circuits and technology for Digital's StrongARM and ALPHA microprocessors [CMOS technology]." Advanced Research in VLSI, 1997. Proceedings., Seventeenth Conference on. IEEE, 1997.
codename	Alpha 21264 +
core count	1 +
designer	DEC +
first launched	February 1998 +
full page name	dec/microarchitectures/alpha 21264 +
instance of	microarchitecture +
instruction set architecture	Alpha +
manufacturer	DEC +, Intel + and Samsung +
microarchitecture type	CPU +
name	Alpha 21264 +
pipeline stages	6 +
process	350 nm (0.35 μm, 3.5e-4 mm) +