A-Tech 4GB KIT 2 x 2GB HP-Compaq HP Pavilion HPE-410y HPE-411sc HPE-413sc HPE-417sc HPE-418sc HPE-420a HPE-420es HPE-420fr HPE-420it DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory 4GB KIT (2 x 2GB) 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 HP Pavilion Desktop. (See Compatibility List Below)