NEW 4GB Memory DDR3-1600MHz PC3-12800 Lenovo ThinkCentre M58 Type 7174 By RK,PC3-12800 Lenovo ThinkCentre M58 Type 7174 By RK NEW 4GB Memory DDR3-1600MHz,You will receive what is detailed in the Item Specifics above.By RK NEW 4GB Memory DDR3-1600MHz PC3-12800 Lenovo ThinkCentre M58 Type 7174.