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6 p5-570 Technical Overview and Introduction
Each processor card features one POWER5 chip, with two processor cores that share
1.9 MB of L2 cache, 36 MB of L3 cache, eight slots for memory DIMMs using DDR1 or DDR2
technology, and requires a minimum of 2 GB memory. (See “Memory features.”)
1.3.2 Memory features
The processor cards that are used in the p5-570 system offer eight sockets for memory
DIMMs. The total memory capacity requires four p5-570 building blocks and eight processor
cards. DDR1 DIMM and DDR2 DIMM are different technologies that require different memory
sockets, so the processor card with POWER5 microprocessors running at 1.9 GHz is
available with two feature codes to allow the two different memory technologies. Table 1-5
shows the memory feature codes that are available at the time of writing. The p5-570 system
supports CUoD options for memory. (See 3.1.2, “Capacity Upgrade on Demand for memory”
on page 53 for more details.)
Table 1-5 Memory feature codes
It is recommended that each processor card have an equal amount of memory installed.
Balancing memory across the installed processor cards enables memory accesses to be
distributed evenly over system components to provide optimal performance.
1.3.3 Disk and media features
Each p5-570 building block features six disk drive bays and two slim-line media device bays.
In a full configuration with four connected p5-570 building blocks, the combined system
supports up to 24 disk bays; therefore, the maximum internal storage capacity is 3.5 TB
(using the disk drive features available at the this time of writing). The minimum configuration
requires at least one 36.4 GB disk drive. Table 1-6 shows the disk drive feature codes that
each bay can contain.
Table 1-6 Disk drive feature code description
CUoD (permanent) FC 7929 FC 7897 FC 7898 FC 7899
Reserve CoD not available FC 7956 FC 7959 FC 7959
On/Off CoD (1-day billing) not available FC 7951, 7952 FC 7951, 7953 FC 7951, 7955
Processor card FC Description
Feature code Description
4452 2048 MB (4x512 MB) DIMMs, 208-pin, 8 ns Stacked DDR1 SDRAM
4454 8192 MB (4x2048 MB) DIMMs, 208-pin, 8 ns Stacked DDR1 SDRAM
4490 4096 MB (4x1024 MB) DIMMs, 208-pin, 250 MHz Stacked DDR1 SDRAM
4491 16384 MB (4x4096 MB) DIMMs, 208-pin, 250 MHz Stacked DDR1 SDRAM
4492 32768 MB (4x8192 MB) DIMMs, 208-pin, 250 MHz Stacked DDR1 SDRAM
7892 2048 MB (4x512 MB) DIMMs, 276-pin, 533 MHz DDR2 SDRAM
7893 4096 MB (4x1024 MB) DIMMs, 276-pin, 533 MHz DDR2 SDRAM
Feature Code Description
3273 36.4 GB, 10K RPM Ultra320 SCSI disk drive assembly