2x256 512MB Memory Dell Dimension 2100 (PIII) PC133 Could be Samsung, Kingston, Hynix, Smart, Corsair, Elpida, Micron, or Nanya Warranty: LIFETIME WARRANTY WorldWide Shipping to most countries & USA Capacity: 512mb (2x256mb) - You receive 2 Stick of the 256mb LONG DIMMS for a total of 512mb