Kingston is the worlds largest independent memory manufacturer in todays performance driven environment memory upgrades provide an easy economical alternative to increase system performance every memory product kingston offers is designed to help you get maximum performance at the best price to you this memory is designed for the following systems acer aspire 5540 series 5541 5542 acer aspire 5550 series 5551 acer aspire 5560 series 5562 5563 acer aspire 5570 series