Replacing A Memory Module - Lenovo ThinkCentre M800 User Manual

Replacing a memory module

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page iii.
The following table provides information about the memory module installation rules that you should
consider when installing or removing a memory module. The "X" mark indicates the memory slots into which
the memory modules should be installed in different situations. To locate the memory module slots, see
"Parts on the system board" on page 5.
Quantity
One memory module
Two memory modules
Three memory modules
Four memory modules
To replace a memory module, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to the
computer.
2. Remove the computer cover. See "Removing the computer cover" on page 52.
3. Locate the memory module you want to replace. The memory modules are installed in the memory slots
on the system board. See "Parts on the system board" on page 5.
4. Remove any parts that might prevent your access to the memory module. Depending on your computer
model, you might need to remove the PCI Express x16 graphics card for easier access to the memory
module. See "Replacing a PCI Express card" on page 72.
5. Open the retaining clips and gently pull the memory module out of the memory slot.
Figure 33. Removing a memory module
Slot 1 Slot 2
X
X
X X
X X
Slot 3
X
.
Chapter 7 Installing or replacing hardware
Slot 4
X
X
X
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