IBM Eserver 345 Series, Option Installation Manual

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v The amount of usable memory will be reduced depending on the system
configuration. The BIOS will display the total amount of installed memory and the
amount of configured memory.
v Your server supports a minimum of two 256 MB DIMMs (for a total of 512 MB)
installed in the DIMM 1 and DIMM 2 memory connectors (J1 and J2,
respectively). When you install additional DIMMs, install them in pairs, with the
next pair in DIMM connectors 3 and 4 (J3 and J4).
v Both DIMMs in a pair must be the same size, speed, type, and technology. You
can mix compatible DIMMs from various manufacturers.
v
The second pair of DIMMs do not have to be the same size, speed, type, and
technology as the first pair.
v Install only 2.5 V, 184-pin, double-data-rate (DDR), PC2100, registered
synchronous dynamic random-access memory (SDRAM) with error correcting
code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2100
(and downward compatible with PC1600) SDRAM Registered DIMM
specification, which is available from http://www.jedec.org/ on the World Wide
Web. For a list of supported options for your server, go to
http://www.ibm.com/us/compat/ on the World Wide Web.
v Your server supports Chipkill
™
technology, if the DIMMs are all of the type 4x.
v
Save new configuration information only if you replace a faulty DIMM that was
marked as
Disabled in the Configuration/Setup Utility program Memory Settings
menu. In this case, re-enable the memory row in the Configuration/Setup Utility
program or reload the default memory settings. See the
User’s Guide on the IBM
xSeries Documentation CD for more information.
v Before you begin, read the documentation that comes with your option.
v Install the DIMMs in the order shown in the following table:
Table 3. DIMM order of installation
Pair DIMM connectors
First 1 and 2 (J1, J2)
Second 3 and 4 (J3, J4)
The following illustration shows how to install DIMMs on the system board.
DIMM 4 (J4)
DIMM 3 (J3)
DIMM 2 (J2)
DIMM 1 (J1)
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IBM xSeries 345 Type 8670: Option Installation Guide