2GB Kit 2 X 1GB DDR2 Memory for Dell Inspiron 518 519 531 531s 545 545s 546 546s Desktop PC2-5300 240 pin 667MHz DIMM RAM Speed: PC2 5300 667MHz Form Factor: 240 pin DIMM Capacity: 2GB Kit 2 x 1GB Warranty: Lifetime Brand: Samsung/3rd