Acer AR160 F1 - Manual (Page 67)

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Removing a memory module:
Important: Before removing any DIMM from the mainboard,
make sure to create a backup file of all important data.
1 Remove the memory module.
a Press the holding clips on both sides of the DIMM slot outward
to release the DIMM.
b Gently pull the DIMM upward to remove it from the DIMM
slot.
2 If you intend to install a new memory module, refer to the
previous section.
To reconfigure the system memory:
The system automatically detects the amount of memory installed. Run
the BIOS setup to view the new value for total system memory and
make a note of it.