Compaq Deskpro AP550 - Removing and Installing Dimms

Removal and Replacement Procedures
3-35
Table 3-8
DIMM Configurations on SDRAM Expansion Board
SDRAM Expansion Board 1
(RIMM Socket XMM1)
SDRAM Expansion Board 2
(RIMM Socket XMM3)
DIMM Pair
Installation Upper DIMM Slot Lower DIMM Slot Upper DIMM Slot Lower DIMM Slot
Pair 1 DIMM DIMM
Pair 2 DIMM DIMM DIMM DIMM
Removing and Installing DIMMs
Important Guidelines for DIMM Installation
When installing DIMMs, you
MUST
follow these guidelines:
Table 3-9
DIMM Guidelines
Guideline Comment
Use only 64-, 128-, 256-, or 512-MB, Registered
100-MHz Error Checking and Correcting (ECC)
DIMMs.
DO NOT INSTALL DIMMs THAT DO NOT SUPPORT
ERROR CHECKING AND CORRECTING (ECC).
SDRAM expansion boards must be installed in pairs,
populating the RIMM sockets in the following order:
XMM1 and XMM3.
Only two SDRAM expansion boards are supported.
Each SDRAM expansion board supports up to two
DIMMs.
Total system support is up to four DIMMs providing
up to 2-GB total memory when four 512-MB DIMMs
are installed.
A SDRAM expansion board can only be installed one
way.
Be sure to match the two
key slots
on the SDRAM
expansion board with the tab on the RIMM socket.
Push the SDRAM expansion board down into the
RIMM socket, ensuring that it is fully inserted and
properly seated.
continued