Sony PCG-GRS100 - Manual (Page 159)

Upgrading Your Computer’s Memory
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3 Snap the connectors into place when the board is correctly seated, and close
the computer cover.
4 Replace the fastening screws on the bottom of the computer.
5 Make sure the system memory matches the amount of installed memory. See
“Confirming added memory capacity” for more information.
Confirming added memory capacity
After you’ve installed a new memory module, make sure the operating system’s
memory corresponds with the memory upgrade.
To check your system’s memory
1 Turn on the computer.
2 Click Start on the Windows® taskbar, point to All Programs, and then
point to Sony Notebook Setup.
Installing a New Memory Module
Memory module