2GB STICK For IBM-Lenovo ThinkCentre M Series M58p (4099-xxx) M58p (6137-xxx) M58p (6138-xxx) M58p (6209-xxx) M58p (6234-xxx) M58p (6302-xxx) M58p (7188-xxx) M58p (7220-xxx) M58p (7346-xxx) M58p (7347-xxx) M58p (7357-xxx) M58p (7358-xxx) M58p (7483-xxx) M58p (7484-xxx) M58p (7630-xxx) M58p (7635-xxx) M58p (9964-xxx) M58p (9965-xxx) M70e M70e (0806-xxx) M70e (0809-xxx) M70e (0822-xxx) M70e (0829-xxx). DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. 2GB STICK DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For IBM-Lenovo ThinkCentre M Series. (See Compatibility List Below)