NEW! 8GB (2X4GB) MEMORY FOR DELL STUDIO XPS 1640 XPS 1645 XPS 1647 Could be Samsung, Kingston, Hynix, Smart, Corsair, Elpida, Micron, or Nanya Warranty: LIFETIME WARRANTY WorldWide Shipping to most countries & USA Capacity: 8gb (2x4gb) - You receive 2 Stick of the 4gb SODIMMS for a total of 8gb