IBM eServer p655

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Designed to provide data-center-class capacity, performance and RAS, the POWER4+™ processors in the pSeries 670 utilize "SMP-on-a-chip" design. At 1.50GHz, this processor ranks among the fastest 64-bit chips in the world1. Because they also incorporate copper and silicon-on-insulator (SOI) technology, POWER4+ processors consume less power—saving energy while delivering high reliability and outstanding performance. Customers with an existing POWER4™ pSeries 670 system can upgrade to a POWER4+ configuration to boost application speed and throughput for growing workload needs.
Innovative CPU packaging also contributes to enterprise-class performance and reliability from the pSeries 670. Advanced Multichip Module (MCM) architecture, similar to the design used in IBM eServer zSeries® servers, places up to eight microprocessors in a single MCM so small that it can fit in the palm of your hand. To further enhance performance, 128MB of Level 3 (L3) cache is packaged with the MCM. L3 cache helps stage information more effectively from processor memory to application programs. By decreasing the physical distance between components, MCMs enable faster movement of information—resulting in greater speed and improved reliability compared with earlier, less dense component configurations.

Additional "book" packaging for memory also enhances reliability by helping to protect components from electrostatic discharge and physical damage. With space for up to eight memory books per server, the pSeries 670 offers up to a 16-way configuration with 4GB to 256GB of total memory—providing tremendous processing power for both commercial and technical workloads.

The unique system architecture of the pSeries 670 enables it to deliver efficient, cost-effective data sharing and application throughput. Designed to support the incredible speed of the processors, the pSeries 670 design also features a peak aggregate memory-to-L3 cache bandwidth of 102.4GB/sec in a 16-way configuration. In addition, the server can deliver an aggregate I/O subsystem bandwidth of up to 14GB/sec.