Memory Modules - IBM 8686 - Eserver xSeries 360 Hardware Maintenance Manual

Memory modules

The server supports up to four pairs of DIMMs and supports memory interleaving.
Adding memory to the server is an easy way to make programs run faster.
Notes:
1. The server supports a minimum of 512 MB of system memory and a maximum
2. Each pair of DIMMs must be the same type, capacity, and speed. However, you
3. Installing or removing DIMMs changes the configuration information in the
Complete the following steps to install the DIMMs:
Notes:
1. Read the information in "Before you begin" on page 71.
2. Read the safety precautions at "Safety notices (multilingual translations)" on
3. Read the material at "Handling static-sensitive devices" on page 148.
1. Turn off the server, disconnect all power cords and external cables, and remove
2. Remove the memory board as shown in the following illustration:
84
Hardware Maintenance Manual: xSeries 360 Type 8686
of 8 GB of system memory. The DIMM slots are arranged in two columns of
four rows each. The server supports DIMMs of 256 MB, 512 MB, and 1 GB
capacities.
can install DIMM pairs of different capacities as long as both DIMMs in each
pair are the same.
server. Therefore, after installing or removing DIMMs, you must save the new
configuration information using the Configuration/Setup Utility program. When
you restart the server, the system displays a message indicating that the
memory configuration has changed. Start the Configuration/Setup Utility
program and select Save Settings. See "Configuration" on page 27 for more
information.
page 149.
the top cover (see "Removing the server top cover and bezel" on page 72).
Note: If the server had a DIMM failure, a DIMM LED on the memory board
indicates the failing module.
Memory board
LED (CR24)
DIMM 1 LED (CR22)
DIMM 3 LED (CR20)
DIMM 5 LED (CR18)
DIMM 7 LED (CR16)
If the DIMM LED is not visible with the memory board in place, after
removing the memory board you can press the Test button on the board
to relight the failing DIMM's LED. If no DIMM has failed, pressing the
Test button lights the Test LED.
Attention: When you handle Electrostatic Discharge-Sensitive devices (ESD),
take precautions to avoid damage from static electricity. For details on handling
these devices, see "Handling static-sensitive devices" on page 148.
a. Lift up the two memory-board locking latches to release the board.
Memory board VRM LED
(CR12)
Test button
Test LED to show
capacitor is charged
DIMM 2 LED (CR23)
DIMM 4 LED (CR21)
DIMM 6 LED (CR19)
DIMM 8 LED (CR17)