4GB KIT (2 x 2GB) For HP-Compaq Presario Notebook Series CQ60-413NR CQ60-417DX CQ60-417NR CQ60-418DX CQ60-419AU CQ60-419WM CQ60-420AU CQ60-420SA CQ60-420US CQ60-421NR CQ60-422DX CQ60-423DX CQ60-427NR CQ60-430SA CQ60-433US CQ60-514NR CQ60-615DX CQ60Z CQ61 CQ61 (CNF001CD59) CQ61-100EE CQ61-100EO CQ61-100EP CQ61-100ES CQ61-100EW CQ61-100SD CQ61-100SL CQ61-100SO CQ61-100SP CQ61-101ET CQ61-101TU CQ61-101TX. SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq Presario Notebook Series. (See Compatibility List Below)