4GB KIT (2 x 2GB) For Gateway DX Series DX4320 DX4320-01e DX4320-02e DX4320-04e DX4320-09 DX4320-17 DX4320-19 DX4320-39 DX4320-45 DX4820 DX4820-01 DX4820-02 DX4820-03 DX4820-07M DX4822 DX4822-03M DX4831 DX4831-01e DX4840 DX4840-02e DX4840-03e DX4840-07 DX4840-11e DX4840-15 DX4840-37. DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gateway DX Series. (See Compatibility List Below)