Installing Or Replacing A Memory Module - Lenovo ThinkCentre Edge 91 User Manual

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 57.

Installing or replacing a memory module

Attention:
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to install or replace a memory module.
Your computer has four slots for installing or replacing DDR3 UDIMMs that provide up to a maximum of 16
GB system memory. When installing or replacing a memory module, use the following guidelines:
• Use 1 GB, 2 GB, or 4 GB DDR3 UDIMMs in any combination up to a maximum of 16 GB.
• 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 slot(s)
into which the memory module(s) should be installed in different situations. The numbers 1, 2, 3, and
4 indicate the installation sequence..
UDIMM
One UDIMM
Two UDIMMs
Three UDIMMs
Four UDIMMs
To install or replace a memory module, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See "Removing the computer cover" on page 30.
3. Lay the computer on its side for easier access to the system board.
4. Locate the memory slots. See "Locating parts on the system board" on page 12.
5. Remove any parts that might prevent your access to the memory slots. Depending on your computer
model, you might need to remove the PCI Express x16 graphics card for easier access to the memory
slots. See "Installing or replacing a PCI card" on page 33.
6. Depending on whether you are installing or replacing a memory module, do one of the following:
DIMM 1 DIMM 2
X, 1
X, 1
X, 1 X, 2
DIMM 3
X
X, 2
X, 3
.
Chapter 5 Installing or replacing hardware
DIMM 4
X, 2
X, 3
X, 4
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