Acer Altos R5250 - Manual (Page 67)

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To install a DIMM:
Warning! DIMM of the identical size, speed, and
organization must be installed in the same colored DIMM
slots.
1 Perform the pre-installation instructions described on page 28.
2 Remove the air duct. Perform the instructions described in “To
remove the air duct” section on page 33.
3 Locate the DIMM slots on the mainboard.
4 Align then insert the DIMMs into the sockets (A).
5 Press the holding clips inward to lock the DIMM in place (B).
Note: The DIMM slot is slotted to ensure proper installation. If
you insert a DIMM but it does not fit easily into the socket, you
may have inserted it incorrectly. Reverse the orientation of the
DIMM and insert it again.
6 Observe the post-installation instructions described on page 28.
7 Reconfigure the system memory. See ‘To reconfigure the system
memory” section on page 50 for more information.
A B