HP 9000 Model D280, Руководство по модернизации

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2-10
R Class System Memory Upgrade
Memory Installation Procedure
G. Plan the Memory
Configuration Before you begin, you should understand the following definitions:
A SIMM (Single In-line Memory Module) is a single memory Printed Circuit
Assembly (PCA) or memory board. SIMMs have memory on one side of the PCA
only. All SIMMs have their size marked on the board near the upper left corner.
A DIMM (Dual In-line Memory Module) is a single memory PCA with memory on
both sides of the PCA. All DIMMs have their size marked on the board near the
upper left corner, also.
A module is a pair of SIMMs or DIMMs. Memory for your system is purchased and
installed only in modules; never install just one SIMM.
NOTE The acronym SIMM is used throughout this document to indicate either SIMM or
DIMM.
Plan your memory configuration so that it conforms to the rules listed below.
Memory is installed in the following increments:
• 32MB memory module (two 16MB SIMMs)
• 64MB memory module (two 32MB SIMMs)
• 128MB memory module (two 64MB SIMMs)
• 256MB memory module (two 128MB SIMMs)
• 512MB memory module (two 256MB SIMMs).