2GB Kit 2 X 1GB DDR2 Memory for Gateway Desktop DX420B DX420QS DX420S DX420X DX430B DX430S DX430X DX440X DX441B DX441S DX441X DX442B DX442S DX442X DX442XP PC2-5300 240 pin 667MHz DIMM NON-ECC RAM Speed: PC2 5300 667MHz Form Factor: 240 pin DIMM Capacity: 2GB Kit 2 x 1GB Warranty: Lifetime Brand: Samsung/3rd