Lenovo ThinkStation C30 Hardware Maintenance Manual page 92

• If your computer has only one microprocessor installed, be sure to install memory modules only in the
memory slots adjacent to that microprocessor.
• If your computer has two microprocessors installed, install equal numbers of memory modules in both
sets of microprocessor DIMM slots for maximum performance.
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 80.
3. Remove the PCI card holder. See "Removing and reinstalling the PCI card holder" on page 81
4. Locate the memory slots. See "Locating parts on the system board" on page 76.
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 83.
6. Depending on whether you are installing or replacing a memory module, do one of the following:
• If you are replacing an old memory module, open the retaining clips and gently pull the memory
module out of the memory slot.
Figure 12. Removing a memory module
• If you are installing a memory module, open the retaining clips of the memory slot into which you
want to install the memory module.
Figure 13. Opening the retaining clips
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ThinkStation Hardware Maintenance Manual