attractive price, lifetime warranty and compatibility with any PC notification, I was plutôtconfiant. BUT NOT RECOGNIZED by two portable 3 tested, accepting of course DDR2 667MHz. the only one who accepted it is an old 3100 ACER 2006, but for connoisseurs, CPU-Z provides for DDR2 400MHz 6400. A AMILO Li2727 (for which I had ordered) and Toshiba L300-19F, both of 2008, did not start at all. Only good news MEMTEST find no error after a pass.