A-Tech 4GB KIT 2 x 2GB HP-Compaq Pavilion dv5-1237tx dv5-1240et dv5-1240ew dv5-1250en dv5-1250er dv5-1250us dv5-1251nr dv5-1253cl dv5-1270en dv5-1270eo SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory 4GB KIT (2 x 2GB) SO-DIMM DDR2 NON-ECC PC2-5300 667MHz 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)