Sony PCG-R505ECP Online Help Center (VAIO User Guide) User Manual page 86

Typical expansion memory configuration
Total System Memory (MB) On board (MB) Slot (MB)
256
384
512
1
T he 5 1 2 M B memory c onfiguration may require the removal and replac ement of original fac tory-ins talled memory module.
1
256 0
256 128
256 256
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