2GB KIT (2 x 1GB) For Dell Inspiron Desktop Series 518 519 530s 531s. DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory. Genuine A-Tech Brand. 2GB KIT (2 x 1GB) DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Inspiron Desktop Series. (See Compatibility List Below)