This guide explains how to replace or upgrade memory modules in Acer Aspire 5500 series laptop. Thanks to benardcometh.blogspot.com
Fortunately, both memory modules can be easily accessed through the bottom of the laptop. It makes the memory upgrade a five minute procedure.
According to Crucial, Acer Aspire 5500 series laptops can handle up to 4GB RAM total and you can install up to 2GB RAM module into each memory slot. Use Crucial Memory Advisor tool to find the correct memory type.