Lenovo 4266, 4271, 4272, 4269, 4265, 4264, 4263 manual Removing the optical drive bracket, User Guide

vUse 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.

vAlways 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.

vIf your computer has only one CPU installed, be sure to install memory modules only in the memory slots adjacent to that CPU.

vIf 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:

1.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.

2.Remove the computer cover. See “Removing the computer cover” on page 13.

3.Remove the PCI card holder. See “Removing and reinstalling the PCI card holder” on page 16.

4.Locate the memory slots. See “Locating parts and connectors on the system board” on page 11.

5.Depending on the memory module that you are replacing, do one of the following:

vIf you are replacing the memory module adjacent to CPU 1, go to 6 on page 32.

vIf you are replacing the memory module adjacent to CPU 2, do the following:

a.Remove the optical drive. See “Replacing the optical drive” on page 29.

b.Pivot the optical drive bracket as shown in the following illustration and then remove it from the chassis. Go to 6 on page 32.

Figure 10. Removing the optical drive bracket

6.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

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