HP 3000 99x Family, Installation Manual

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3-18 Chapter 3
Installation
PMB Cards
The reason for this guideline has to do with memory interleaving. The Processor
Dependent Code (PDC) will configure memory cards with the largest bank size (256 MB) in
Memory Interleave Group 1 (assigned Block_IDs 40-5n). Memory cards with a smaller
bank size (64MB) are configured in Memory Interleave Group 3 (assigned Block_IDs
C0-Dn).
Minimum Recommended Memory
Table 3-3 shows the recommended minimum memory for each CPU configuration. The
recommended minimum is the least amount of memory necessary to achieve satisfactory
performance under normal workloads. It may be necessary or desirable to increase the
actual memory in the configuration to achieve optimum performance for a specific
application workload.
Table 3-3 Minimum Recommended Memory
Memory Interleaving
99x/T-Class Systems support memory interleaving to improve system performance. The
system automatically configures memory for interleaving and no special procedures are
necessary.
Installing a Memory Card
To install/remove a memory card:
1. If the system is running the operating system (OS), shut down the OS using the
appropriate command.
2. Wait until the OS has finished its shutdown routine.
# of CPUs
Recommended
Minimum
1 256 MB
2 384 MB
3 512 MB
4 640 MB
5 768 MB
6 896 MB
7 1024 MB
8 1152 MB
9 1280 MB
10 1408 MB
11 1536 MB
12 1664 MB