PC3-8500 DDR3 memory offers maximum data transfer rates up to 1066MB/sec (1) to help you increased performance of memory intensive applications such as streaming video, graphics and CAD programs. Adding more system memory is one of the least expensive ways to help boost overall desktop system performance and allows more multitasking which saves time and hassle. Compatible with ThinkCentre M58, M58p Small Form Factors (SFF’s), Towers systems.Increased performance over DDR2; DDR3 is 1066 MHz compared to DDR2 at 667 MHz or 800 MHz 25% lower power consumption than DDR2; DDR3 is 1.5V compared to DDR2 at 1.8V Test-proven 100% compatibility listed for supported ThinkCentre systems Meets stringent ThinkCentre reliability standards for memory products Lenovo limited warranty Lenovo memory installed in a new Lenovo system automatically assumes system warranty For more information on options, accessories, including compatibility, please visit: www.lenovo.com/accessoriesguide (1)Data transfer rates vary.