Kingston Technology 4GB 1333MHz DDR3 Single Rank SODIMM for HP/Compaq Laptop KTH-X3BS/4G One 4GB Module of 1333MHZ DDR3 Memory Backed by a lifetime warranty and free technical support From the industry leader in PC memory Designed and tested for compatibility in various HP/Compaq Laptops HP EliteBook 2170, 2560, 2570, 2760, 8460, 8470, 8560, 8570; Envy 14, 15, 17; Envy Sleekbook 4, 6; Mobile Thin Client 6360; Pavilion dm4,dv4, dv6, dv7, g6, G7, m6; ProBook 4340, 4540, 4740, 6360, 6460, 6465, 6470, 6560, 6570