Read more about Sony VAIO VGN-CS390memory before ordering
Memory modules are generally very generic. DDR memory is also backward compatible within its own series. A DDR2-800 can be used in a DDR2-667 application, for example. SODIMM memory does not need to be used in pairs like the older SIMMS required. Make sure you have the correct model as some models look similar.
Generic 1GB DDR2-800 PC6400 SODIMM Laptop Memory Module for Sony VAIO VGN-CS390
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