Sony PCG-R505DSK - Manual (Page 97)

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Adding Memory
In the future you may want to install memory modules to expand the
functionality of your notebook. The amount of memory on your notebook
will vary depending on the model you purchased. Expansion memory
modules are available as options. For memory upgrades, use only
unbuffered PC133 (CL2) SDRAM SO-DIMM (gold lead contacts). This
section describes how to replace memory modules in your computer:
❑ Precautions and Procedures
❑ Installing a Memory Module
❑ Removing a Memory Module
❑ Viewing Memory