Acer AR320 F1 - Manual (Page 63)

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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 Perform the pre-installation instructions described on page 22.
2 Remove the memory module.
(1) Press the holding clips on both sides of the DIMM slot outward
to release the DIMM.
(2) Gently pull the DIMM upward to remove it from the DIMM
slot.
3 If you intend to install a new DIMM, refer to the previous section,
otherwise observe the post-installation instructions described on
page 23.