Lenovo ThinkServer RS140 - Manual (Page 72)

The following table explains the memory module installation rules for your server. The “X” mark indicates the
memory slots into which the memory modules should be installed in different situations.
Table 3. Memory module installation rules
DIMM DIMM1 DIMM2 DIMM3 DIMM4
One DIMM X
Two DIMMs X X
Three DIMMs X X X
Four DIMMs X X X X
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 53.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Notes:
• Ensure that you follow the memory module installation rules when performing the operation. See “Memory
module installation rules” on page 59.
• 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. If the server is installed in a rack cabinet, remove the server from the rack cabinet and place it on a flat,
clean, and static-protective surface.
3. Remove the server cover. See “Removing the server cover” on page 55.
4. Locate the memory slots on the system board and read the memory module installation rules. See
“Memory module installation rules” on page 59.
5. Open the retaining clips of the appropriate memory slot.
Figure 30. Opening the retaining clips of the memory slot
60 ThinkServer RS140 User Guide and Hardware Maintenance Manual