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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 rst.
Chapter 2. Installing or replacing hardware 17