Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 64

Removing and Installing RIMMs, Important Guideline for RIMM Installation, Table 3-6, RIMM Guidelines

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Removal and Replacement Procedures 3-31 Removing and Installing RIMMs Important Guideline for RIMM Installation When installing RIMMs, you MUST follow these guidelines: Table 3-6 RIMM Guidelines Guideline Use only 64-, 128-, or 256-MB, 600-MHz or 800-MHz Error Checking and Correcting (ECC) RIMMs. Do not mix 600- with 800-MHz RIMMs. Do not exceed 32-count Direct RDRAM devices on each Direct Rambus channel. Install RIMMs correctly. Populate unused RIMM sockets with a Continuity RIMM (CRIMM). Install RIMM modules in pairs across both channels. Do not mix RIMMs and DIMMs on the same system board. Comment DO NOT INSTALL RIMMS THAT DO NOT SUPPORT ERROR CHECKING AND CORRECTING (ECC). Each RIMM pair must be the same type, size, and speed. A factory label on the RIMM indicates the type, size, speed, and number of RDRAMS contained on the RIMM. Be sure to match the two key slots on the RIMM with the tab on the RIMM socket. Push the RIMM down into the RIMM socket, ensuring that it is fully inserted and properly seated. If CRIMMs are not in the empty RIMM sockets, the system will not boot. RIMM sockets must be populated in the following order: XMM1 and XMM3 then XMM2 and XMM4. The system will not boot if RIMMs and DIMMs are mixed on the same board. CAUTION: The above guidelines must be followed when installing RIMM modules; otherwise, the workstation will not function. CAUTION: RIMM sockets have gold metal contacts. When upgrading memory, it is important to use RIMMs with gold metal contacts (not tin-lead) to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other. CAUTION: When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module. NOTE: The workstation will support up to 2-gigabyte of memory with 256-megabit DRAM technology.

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Removal and Replacement Procedures
3-31
Removing and Installing RIMMs
Important Guideline for RIMM Installation
When installing RIMMs, you
MUST
follow these guidelines:
Table 3-6
RIMM Guidelines
Guideline
Comment
Use only 64-, 128-, or 256-MB, 600-MHz or
800-MHz Error Checking and Correcting (ECC)
RIMMs.
DO NOT INSTALL RIMMS THAT DO NOT SUPPORT
ERROR CHECKING AND CORRECTING (ECC).
Do not mix 600- with 800-MHz RIMMs.
Each RIMM pair must be the same type, size, and
speed.
Do not exceed 32-count Direct RDRAM devices on
each Direct Rambus channel.
A factory label on the RIMM indicates the type, size,
speed, and number of RDRAMS contained on the
RIMM.
Install RIMMs correctly.
Be sure to match the two
key slots
on the RIMM with
the tab on the RIMM socket. Push the RIMM down
into the RIMM socket, ensuring that it is fully inserted
and properly seated.
Populate unused RIMM sockets with a Continuity
RIMM (CRIMM).
If CRIMMs are not in the empty RIMM sockets, the
system will not boot.
Install RIMM modules in pairs across both channels.
RIMM sockets must be populated in the following
order: XMM1 and XMM3 then XMM2 and XMM4.
Do not mix RIMMs and DIMMs on the same system
board.
The system will not boot if RIMMs and DIMMs are
mixed on the same board.
CAUTION:
The above guidelines must be followed when installing RIMM modules; otherwise,
the workstation will not function.
CAUTION:
RIMM sockets have gold metal contacts. When upgrading memory, it is important to
use RIMMs with gold metal contacts (not tin-lead) to prevent corrosion and/or oxidation
resulting from having incompatible metals in contact with each other.
CAUTION:
When handling a memory module, be careful not to touch any of the contacts. Doing
so may damage the module.
NOTE:
The workstation will support up to 2-gigabyte of memory with 256-megabit DRAM technology.