16GB KIT (4 x 4GB) For Gateway DX Series DX4350 DX4350-43 DX4840 DX4840-01M DX4840-02e DX4840-03e DX4840-07 DX4840-11e DX4840-15 DX4840-37 DX4850 DX4850-27e DX4850-27EU DX4850-45 DX4850-45u DX4850-57 DX4850-H74D DX4860 DX4860-EF10P DX4860-EF11P DX4860-EF12P DX4860-EF13P DX4860-MB10P DX4860-MB11P DX4860-MO10P DX4860-MO11P DX4860-MR20P DX4860-UB20P DX4860-UB21P DX4860-UB32P DX4860-UB33P. DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 16GB KIT (4 x 4GB) DIMM DDR3 NON-ECC PC3-10600 1333MHz 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)