Sony VGC-V3M User Manual page 51

8 To insert a new memory module, remove it from its anti-static package, handling it only by the edges.
9
Locate the notch on the bottom edge of the memory module.
10 Align the memory module over the slot, making sure the module is facing the correct way.
11 Press evenly against the memory module's upper corners. The end latches snap into position automatically, as shown.
n N
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Upgrading your VAIO computer