A-Tech 8GB KIT 2x 4GB HP-Compaq Pavilion dm4-1121tx dm4-1123tx dm4-1125tx dm4-1140sa dm4-1150ca dm4-1150ea dm4-1160us dm4-1162us dm4-1164nr dm4-1165dx SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory 8GB KIT (2 x 4GB) SO-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 HP-Compaq Pavilion Series. (See Compatibility List Below)