Sony PCG-F640 VAIO User Guide (primary manual) User Manual page 84

VAIO Notebook User Guide
Install the memory module.
3
Installing memory module
1 Slide the memory module into the slot.
Tighten the screw on the cover of the memory bay.
4
To view the amount of memory
1 Restart the computer.
2 Click the Start button on the Windows status bar, point to VAIO option, and
click "Sony Notebook Setup."
The Sony Notebook Setup screen appears.
3 Click the "About This Computer" tab to view the amount of system memory.
If the additional memory is not shown, repeat steps 1 through 4 in "To install
a memory module."
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2 Press the module into place until it clicks.