Sony PCG-XG29 - Manual (Page 119)

Adding Memory %
To view the system memory
1
Turn on the computer.
2
Click the Start button, point to VAIO, and click “Sony Notebook
Setup.”
The Sony Notebook Setup screen appears.
3
Click the “About This Computer” tab to view the system memory. If
the additional memory is not shown, repeat steps 1-9 of “To install a
memory module” on page 104.