Lenovo 70AL, Maintenance Manual, Page: 87 / 190

The following illustration shows the locations of all memory slots on the system board.
Figure 34. Memory slots on the system board
1
Memory slot (DIMM1)
3
Memory slot (DIMM3)
2
Memory slot (DIMM2)
4
Memory slot (DIMM4)
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 1. 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 65.
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.
Chapter 6
.
Installing, removing, or replacing hardware
75