IBM System p

IBM System p

The System p, formerly known as RS/6000, was IBM's RISC/UNIX-based server and workstation product line.

In April 2008, IBM announced a rebranding of the System p and its unification with the System i platform. The resulting product line is called IBM Power Systems.


It was originally a line of workstations and servers called RS/6000. The server line was then renamed to the "e"Server pSeries in 2000 as part of its e-Server branding initiative.With the advent of the POWER5 processor in 2004 the family was rebranded the "e"Server p5.With the global move of the server and storage brands to the System brand with the Systems Agenda, the family was renamed yet again to System p5 in 2005.The System p5 now encompasses the IBM OpenPower product line.With the introduction of POWER6 processor models the new models are now being released under the System p brand, dropping the p5 designation.


Where RS/6000 used a mix of early POWER and PowerPC processors, when pSeries came along this had evolved into RS64-III and POWER3 across the board. POWER3 for its excellent floating point performance and RS64 for its scalability, throughput and integer performance.

IBM developed the POWER4 processor to replace both POWER3 and the RS64 line in 2001. After that the differences between throughput and number crunching optimized systems no longer existed. Since then System p machines evolved to use the POWER5 but also PowerPC 970 for the low end and blade systems.

The last System p systems used the POWER6 processor, such as the POWER6 based System p 570 and the JS22 blade. In addition IBM introduced during the SuperComputing 2007 (SC07) conference in Reno a new POWER6 based System p 575 with 32 POWER6 cores at 4.7GHz and up to 256GB of RAM with water cooling.


All IBM System p5 and IBM "e"Server p5 machines support DLPAR (Dynamic Logical Partitioning) with Virtual I/O and Micro-partitioning.

System p generally uses the AIX operating system and, more recently, 64-bit versions of the Linux operating system. Sun Microsystems is also developing OpenSolaris port, currently experimental [ [ Embedded Solaris on PowerPC ] ] .

Current models

ystem p

* IBM System p5 505
* IBM System p5 505Q
* IBM System p5 510
* IBM System p5 510Q
* IBM System p5 520
* IBM System p5 520Q
* IBM System p 520 (POWER6)
* IBM System p5 550
* IBM System p5 550Q
* IBM System p5 550Q Express (4-8 POWER5+ CPUs) (Model 9133-55A)
* IBM System p 550 (POWER6)
* IBM System p5 560Q
* IBM System p5 570
* IBM System p 570 (POWER6)
* IBM System p5 575
* IBM System p 575 (POWER6)
* IBM System p5 590
* IBM System p5 595

IntelliStation POWER

* IBM IntelliStation POWER 185 (PowerPC 970)
* IBM IntelliStation POWER 285


* IBM BladeCenter JS21 (PowerPC 970)
* IBM BladeCenter JS22 (POWER6)

Discontinued models


* IBM eServer pSeries 610
* IBM eServer pSeries 615
* IBM eServer pSeries 620
* IBM eServer pSeries 630
* IBM eServer pSeries 640
* IBM eServer pSeries 650
* IBM eServer pSeries 655
* IBM eServer pSeries 660
* IBM eServer pSeries 670
* IBM eServer pSeries 680
* IBM eServer pSeries 690


* IBM eServer OpenPower 710
* IBM eServer OpenPower 720

IntelliStation POWER

* IBM IntelliStation POWER 265
* IBM IntelliStation POWER 275


* IBM BladeCenter JS20 (PowerPC 970)

ee also

*Web-based System Manager, an AIX management software
*IBM Hardware Management Console, a management appliance
*Dynamic Logical Partitioning
*Linux on Power
*IBM IntelliStation POWER
*IBM System i
*List of IBM products


External links

* [ IBM Power Systems product page]
* [ IBM RS6000 Support Forum]
* [ IBM's System Agenda]
* [ "IBM launches POWER5-based p5 server line"] – Ars Technica, 14 July 2004
* [ IBM RS/6000 PowerPC/AIX Notebook]
* [ RS/6000 Machine Type Models]

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