Installing or replacing a memory module - ThinkCentre M90z
This section provides instructions on how to install or replace a memory module.
Your computer has two slots for installing or replacing DDR3 SODIMMs (small outline dual inline memory modules). When installing or replacing a memory module, use 1 gigabytes (GB) or 2 GB DDR3 SODIMMs in any combination up to a maximum of 4 GB of system memory.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.
Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.
Open the retaining clips. If you are replacing an old memory module, open the retaining clips and remove the old memory module, as shown:
Insert the notched end 2 of the new memory module into the slot 1. Press the memory module firmly and pivot the memory module until it snaps into place. Make sure that the memory module is secured in the slot and does not move easily.