Acer Altos R920 Series - Manual (Page 94)

3 System upgrade 76
To install the memory board assembly:
1 Perform the pre-installation instructions described on page 39.
2 Locate an empty memory board slot.
3 Add or replace memory DIMMs as needed. For instructions, see
“Installing and removing DIMM modules” section.
4 Lift the memory board latches to the fully open position.
5 Insert the memory board until latches are securely locked.
6 Observe the post-installation instructions described on page 40.