Editing DEC Alpha (section)

==Alpha-based systems==
The first generation of DEC Alpha-based systems comprise the [[DEC 3000 AXP]] series workstations and low-end servers, [[DEC 4000 AXP]] series mid-range servers, and [[DEC 7000/10000 AXP|DEC 7000 AXP and 10000 AXP]] series high-end servers. The DEC 3000 AXP systems use the same [[TURBOchannel]] bus as the prior [[MIPS architecture|MIPS]]-based DECstation models, whereas the 4000 is based on [[Futurebus]]+ and the 7000/10000 share an architecture with corresponding [[VAX]] models.

DEC also produced a [[personal computer]] (PC) configuration Alpha workstation with an [[Extended Industry Standard Architecture]] (EISA) bus, the [[DECpc AXP 150]] (codename ''Jensen'', also named the DEC 2000 AXP). This is the first Alpha system to support [[Windows NT]]. DEC later produced Alpha versions of their Celebris XL and [[Digital Personal Workstation]] PC lines, with 21164 processors.

Digital also produced [[single-board computer]]s based on the [[VMEbus]] for embedded and industrial use. The first generation includes the 21068-based AXPvme 64 and AXPvme 64LC, and the 21066-based AXPvme 160. These were introduced on March 1, 1994. Later models such as the AXPvme 100, AXPvme 166 and AXPvme 230 are based on the 21066A processor, while the Alpha VME 4/224 and Alpha VME 4/288 are based on the 21064A processor. The last models, the Alpha VME 5/352 and Alpha VME 5/480, are based on the 21164 processor.

The 21066 chip is used in the [[DEC Multia]] VX40/41/42 compact workstation and the ALPHAbook 1 laptop from Tadpole Technology.

In 1994, DEC launched a new range of [[AlphaStation]] and [[AlphaServer]] systems. These use 21064 or 21164 processors and introduced the [[Peripheral Component Interconnect|PCI]] bus, [[VGA]]-compatible [[frame buffer]]s and [[PS/2 connector|PS/2]]-style keyboards and mice. The AlphaServer 8000 series supersedes the DEC 7000/10000 AXP and also employs XMI and FutureBus+ buses.

The AlphaStation XP1000 is the first workstation based on the 21264 processor. Later AlphaServer/Station models based on the 21264 are categorised into ''DS'' (departmental server), ''ES'' (enterprise server) or ''GS'' (global server) families.

The final 21364 chip is used in the AlphaServer ES47, ES80 and GS1280 models and the AlphaStation ES47.

A number of [[Original equipment manufacturer|OEM]] [[motherboard]]s were produced by DEC, such as the 21066 and 21068-based AXPpci 33 "NoName", which was part of a major push into the OEM market by the company,<ref>Reinhardt Krause. "DEC launching Alpha board push". Electronic News, April 4, 1994.</ref> the 21164-based AlphaPC 164 and AlphaPC 164LX, the 21164PC-based AlphaPC 164SX and AlphaPC 164RX and the 21264-based AlphaPC 264DP. Several third parties such as Samsung and API also produced OEM motherboards such as the API UP1000 and UP2000.

To assist third parties in developing hardware and software for the platform, DEC produced Evaluation Boards, such as the EB64+ and EB164 for the Alpha 21064A and 21164 microprocessors respectively.

The 21164 and 21264 processors were used by [[NetApp]] in various [[network-attached storage]] systems, while the 21064 and 21164 processors were used by [[Cray]] in their [[Cray T3D|T3D]] and [[Cray T3E|T3E]] [[massively parallel]] supercomputers.

===Supercomputers===
The fastest supercomputer based on Alpha processors was the [[ASCI Q]] at Los Alamos National Laboratory. The machine was built as an HP AlphaServer SC45/GS Cluster. It had 4096 Alpha (21264 EV-68, 1.25&nbsp;GHz) CPUs, and reached an R<sub>max</sub> of 7.727 [[TFLOPS]].<ref>{{cite web 
 |url=http://www.sandia.gov/supercomp/sc2002/flyers/ASCI_Q_rev.pdf 
 |title=The ASCI Q System: 30 TeraOPS Capability at Los Alamos National Laboratory 
 |author=Los Alamos National Laboratories 
 |year=2002 
 |access-date=2010-06-06 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20110112020420/http://www.sandia.gov/supercomp/sc2002/flyers/ASCI_Q_rev.pdf 
 |archive-date=2011-01-12 
}}</ref>