4GB KIT (2 x 2GB) For Gateway MX Series MX6243m 1014214R MX6959 MX6960 MX6961 MX6961h MX8707j MX8715. SO-DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) SO-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 Gateway MX Series. (See Compatibility List Below)