Installing Or Replacing A Memory Module - Lenovo ThinkStation C20 User Manual

Figure 9. Installing the PCI card holder

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 ThinkStation Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkStation
Safety and Warranty Guide, go to:
http://support.lenovo.com
This section provides instructions on how to install or replace a memory module.
Depending on your model, your computer has six or 12 slots for installing or replacing DDR3 ECC UDIMMs
(double data rate 3 error correction code unbuffered dual in-line memory modules) or DDR3 ECC RDIMMs
(double data rate 3 error correction code registered dual in-line memory modules). See "Locating parts
and connectors on the system board" on page 9.
When installing or replacing memory modules, use the following guidelines:
• Use either DDR3 ECC UDIMMs or DDR3 ECC RDIMMs for your computer. Do not install both the
UDIMMs and RDIMMs into the same computer.
• Use 1 GB, 2 GB, or 4 GB UDIMMs in any combination up to a maximum of 24 GB or 48 GB of system
memory.
• Use 1 GB, 2 GB, 4 GB, 8 GB, or 16 GB RDIMMs in any combination up to a maximum of 96 GB or
192 GB of system memory.
• Always install DIMMs in the numerical order printed on the system board (DIMM1, DIMM2, DIMM3, and
so on). Install memory modules into the blue memory slots first.
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Chapter 2 Installing or replacing hardware
17