There is an excellent manufacturer-specific search on kingston.com. Simply select the manufacturer and computer model and you will get a list of compatible memory bars. You can then enter the model name of the memory found there into the search field at Digitec.
For an HP DV6 you need PC3, 1066 MHz front side bus (FSB), DDR3 .Here the link to the PDF technical data: http://www.hp.com/ctg... There you will find different configurations. Kind regards.