8GB 2X4GB Memory RAM for Dell Studio Laptop 1558 204pin 1333MHz PC3-10600 DDR3 SO-DIMM Black Diamond Memory Module Upgrade - Walmart.com
Specs DELL Studio 1558-1574 i3-370M 39.6 cm (15.6") Intel® Core™ i3 4 GB DDR3-SDRAM 500 GB AMD Radeon HD 5470 Windows 7 Home Premium Blue Notebooks (222616)
Review Dell Studio 1558 Notebook - NotebookCheck.net Reviews