The pSeries 655 is designed to offer leadership performance for a
dense cluster optimized server package, targeted for High Performance
Computing (HPC) and Business Intelligence (BI) customers within the UNIX
server environment. Designed for the medium to large customer whose
workloads are best managed with a clustered-server solution, the p655
provides flexibility and scalability. Additional upside opportunity
includes current SP customers outside HPC/BI looking to upgrade, expand,
or integrate more compute power for workload consolidation or enterprise
applications.

Based on IBM's advanced POWER4 microprocessor technology with up to
1.3 GHz, 64-bit processor speed, copper and SOI technology, the p655
offers high performance in a dense package with favorable
price/performance characteristics, allowing up to 128 processors in a
single frame.

pSeries 655 systems configured with 4-way, high-memory-bandwidth
processor MCMs (#5513 or #5518)) may be especially attractive to
customers in the high-performance computing environment. This
configuration provide twice the amount of Level 2 and Level 3 cache, and
additional memory bandwidth per processor when compared to systems
configured with 8-way processor MCMs.

This additional cache and memory bandwidth available for each
processor in this configuration may provide significantly higher
performance per processor for certain engineering and technical
environment applications.

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69a626
0986 |A| CCS Customer Service Specify (US)

64c721
5518 |A| 4-Way 1.7GHz POWER4+ Processor, 128MB L3 Cache and System
5518 |S| 4-Way 1.7GHz POWER4+ Processor, 128MB L3 Cache and System

66c723
5519 |A| 8-Way 1.7GHz POWER4+ Processor, 128MB L3 Cache and System
5519 |S| 8-Way 1.7GHz POWER4+ Processor, 128MB L3 Cache and System

88c745
6430 |A| Service Support Processor
6430 |S| Service Support Processor

90c747
6569 |A| ULTRA320 SCSI Backplane, two position
6569 |S| ULTRA320 SCSI Backplane, two position

96c753
8398 |A| SP Switch2 PCI-X Attachment Adapter
8398 |S| SP Switch2 PCI-X Attachment Adapter

51c808

58c815

Physical Specifications

252,1253c1309,1310

Operating Environment

332,1333c1389,1390

Limitations

460,1482c1517

p655 (POWER4+) Memory

The pSeries 655 (with POWER4+ MCM's) has four memory slots.

Minimum 7039-651 memory is 4 GB. Maximum memory is 32 GB
(64 GB by RPQ).

Memory is available in 4 GB (#4456) 8 GB (#4457) and 16 GB
(#4458) sizes.

Supported memory plug rules/configurations:

      Total memory    Slot 1    Slot 2    Slot 3    Slot 4

       ------------    ------    ------    ------    ------

          4 GB           4 GB      -         -         -

          8 GB           4 GB      -        4 GB       -

         16 GB           4 GB     4 GB      4 GB      4 GB

         16 GB(1)        8 GB      -        8 GB       -

         32 GB          16 GB      -       16 GB       -

         64 GB(2)       16 GB    16 GB     16 GB     16 GB

Note: (1) Quantity of four 8 GB cards not supported with #5515 or #5518.

Note: (2) 64 GB total memory supported by RPQ.

Memory placement and balancing across processors is desirable for

845,1846c1880,1881

Hardware Requirements

877,1878c1912,1913

Software Requirements

889c1924

904,1931d1938

The following publications are available immediately after planned
availability.

          Title                         Order Number Language

 --------------------------------        ------------ -------------

  pSeries 655 User's Guide                SA38-0617   U.S. English

                                          S517-7619   Brazilian

                                          SA10-7109   Catalan

                                          SA11-1629   French/Canadian

                                          SA12-4966   German

                                          SA22-5661   Hungarian

                                          SA88-8711   Japanese

                                          SA30-1830   Korean

                                          SA85-0091   Polish

                                          SA43-0264   Russian

                                          SA12-7420   Slovakian

                                          SA10-5372   Spanish

                                          SA76-0052   Turkish

  PCI Adapter Placement Reference         SA38-0538   U.S. English

                                          SA22-5601   Hungarian

                                          SA88-6847   Japanese

                                          SA85-0011   Polish

                                          SH43-0087   Russian

                                          S152-0332   Simplified Chinese

                                          SA12-6242   Slovakian

                                          SA10-5166   Spanish

                                          SA40-0365   Traditional Chinese

936c1943

943c1950

947c1954

951c1958

956,1957c1963,1964

No Charge Specify Codes

997a2005

(#0986) - CCS Customer Service Specify (US)

028,2034c2036,2037

COLOR: A specify code is not required.

VOLTAGE: A specify code for voltage/power is required and will be
provided by the configurator based on the country code of the order.

LANGUAGE: A specify code for language is required and will be
provided by the configurator based on the country code of the order.

Special Feature Codes -- Chargeable

217a2221,2237

(#0986) CCS Customer Service Specify (US)

This feature code specifies that the system will receive special
request services from the Center for Customized Solutions (CCS).

FC 0986 is available only on the initial plant order.

Attributes provided: None

Attributes required: None

For 7039-651: (#0986)

Minimum required: 0

Maximum allowed: 1 (Initial order maximum: 1)

OS level required: None

Initial Order/MES/Both/Supported: Initial

CSU: Does not apply

Return parts MES: Does not apply

276a4297

(No Longer Available as of November 18, 2005)

298a4320

(No Longer Available as of November 18, 2005)

850c4872

(No Longer Available as of June 24, 2005)

(No Longer Available as of December 30, 2005)

167a5190

(No Longer Available as of November 18, 2005)

205a5229

(No Longer Available as of November 18, 2005)

278a5303

(No Longer Available as of November 18, 2005)

952,5953c5977,5978

Feature Exchanges

959c5984

971c5996

981c6006

989c6014

003a6029