Lenovo 70B4, User Manual And Hardware Maintenance Manual

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The following table explains the memory module installation order for servers that have two microprocessors
(CPU1 and CPU2) installed.
Table 14. Memory module installation order in lockstep mode for servers with two microprocessors
CPU1 DIMM CPU2 DIMM
A1 A2 B1 B2
C1 C2
D1 D2 E1 E2 F1 F2
DIMM installation order 1 5 2 6 3 7 4 8
Installing a memory module
Attention: Do not open your server or attempt any repair before reading and understanding “Safety information”
on page iii and “Guidelines” on page 83.
This topic provides instructions on how to install a memory module.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Notes:
• To optimize system performance, ensure that you consider and follow the memory module installation
rules when performing the operation. See “Memory module installation rules” on page 93.
• Use any documentation that comes with the memory module and follow those instructions in addition to
the instructions in this topic.
To install a memory module, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. Remove the server cover. See “Removing the server cover” on page 85.
3. Lay the server on its side for easier operation.
4. Locate the memory slots on the system board. See “System board components” on page 48.
5. Remove any parts or disconnect any cables that might prevent your access to the memory slots.
6. Open the retaining clips of the appropriate memory slot. See “Memory module installation rules” on
page 93 for the installation sequence information.
Figure 46. Opening the retaining clips of the memory slots
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ThinkServer TD340 User Guide and Hardware Maintenance Manual