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://www.lenovo.com/support
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".
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.
- If your computer has only one CPU installed, be sure to install memory modules only in the memory slots adjacent to that CPU.
- If your computer has two CPUs installed, install equal numbers of memory modules in both sets of CPU DIMM slots for maximum performance.
To install or replace a memory module, do the following:
- Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.
- Remove the computer cover. See "Removing the computer cover".
- Remove the PCI card holder. See "Removing and reinstalling the PCI card holder".
- Locate the memory slots. See "Locating parts and connectors on the system board".
- Depending on the memory module that you are replacing, do one of the following:
- If you are replacing the memory module adjacent to CPU 1, go to 6 on page 110.
- If you are replacing the memory module adjacent to CPU 2, do the following:
a) Remove the optical drive. See "Replacing the optical drive".
b) Pivot the optical drive bracket as shown in the following illustration and then remove it from the chassis.
Figure 1. Removing the optical drive bracket
- For some computer models, you might need to remove the memory fan duct to access the memory slots. To remove the memory fan duct, disconnect the memory fan cable from the system board, remove the blue shipping clip, press inward on the two tabs (1), pivot the fan duct, and then disengage the rear of the fan duct.
Note: Not all computer models have the memory fan duct and blue shipping clip.
Figure 2. Removing the memory fan duct
- Open the retaining clips as shown.
Figure 3. Opening the retaining clips
If you are replacing an old memory module, open the retaining clips and gently pull the memory module out of the memory slot.
Figure 4. Removing a memory module
a. If your computer has 12 memory slots on the system board, you might have to use more force to remove the memory modules installed in memory slots (1) and (2).
b. If your computer has six memory slots on the system board, you might have to use more force to remove the memory module installed in memory slot (1).
- Position the new memory module over the memory slot. Make sure that the notch (1) on the memory module aligns correctly with the key (2) in the memory slot. Push the memory module straight down into the slot until the retaining clips close.
Figure 5. Installing a memory module
- To install the memory fan duct, engage the rear of the duct with the retainer on the system board and then pivot the fan duct downward until the fan duct snaps into position. Reconnect the memory fan cable to the system board. See "Locating parts and connectors on the system board".
Figure 6. Installing the memory fan duct
- Reinstall the blue shipping clip if your computer needs to be repackaged and shipped in the future.
- Reinstall the optical drive bracket into the chassis if you have removed it. Then, reinstall the optical drive into the chassis. See "Replacing the optical drive".
- Reinstall the PCI card holder. See"Removing and reinstalling the PCI card holder".
- To complete the installation or replacement, go to "Completing the parts replacement".