4. Choose an empty memory module connector for the new memory module.
5. Install the memory module.
Note: New memory modules must be installed in the first available vacant
connector, starting at location A. If your system unit is a Model 240,
memory modules must be installed in identical pairs (size and speed).
See the figure above.
6. The memory modules are keyed so that they can only be inserted one way.
Align the memory module notches with the keys in the memory connector.
7. Insert the memory module into the first unused memory connector. Push down
on the memory module until the latch tabs lock the memory module into the
connector. (Do not attempt to move the latch tabs yourself. They lock
automatically when you have fully inserted the memory module.)
Chapter 4. Installing and Removing Options 4-27