IBM 847620U - Netfinity 3000 - 20U, Hardware Maintenance Manual, Page: 134 / 270

Memory modules
Adding system memory to the server can make programs
run faster. You can increase the amount of system
memory by installing options called
memory modules.
The maximum amount of system memory the server
supports is 384 MB. You can add memory to the server to
increase system performance. The server has three
connectors for installing system memory modules.
Note
The following illustration is for reference only. Before
you install memory, be sure to check the orientation of
the server system board for the correct connector
locations.
To locate the memory connectors on the system
board, see “System board illustration” on page 142.
DIMM 0
DIMM 1
DIMM 2
The memory modules that the server uses are dual-inline
memory modules (DIMMs). The DIMMs that come with
the server are synchronous dynamic random-access
memory (SDRAM) with error checking and correction
(ECC). These memory modules have a speed of 100
MHz. You can add extra memory modules or replace
existing memory modules.
When installing or replacing DIMMs, follow these
guidelines:
Ÿ
The server comes with one or more dual-inline
memory modules (DIMMs) installed.
Ÿ
Install DIMMs with a maximum height of 6.35 cm
(2.5 inches).
Ÿ
Use only 3.3 V dc unbuffered, 100 MHz SDRAM
DIMMs.
Ÿ
Each memory connector supports a maximum of 128
MB of memory. However, the maximum amount of
system memory the server supports is 384 MB.
Ÿ
Install only ECC DIMMs to enable ECC. If you install
nonparity (NP) DIMMs, the server will not power up,
and POST memory error code 164 will be displayed.
Ÿ
If you are installing DIMMs of different sizes, install
the DIMMs with greater memory capacity starting with
the connector closest to the edge of the system board
(DIMM 2).
Ÿ
After installing or removing a DIMM, you must save
the new configuration information using the
Configuration/Setup Utility program. See
126
Netfinity Server HMM