Hiport 4GB RAM Memory For Lenovo ThinkCentre M58 (TYPE9728), M58P (type 7347, 7483, 7484, 7630, 7635, 9964 AND 9965), M58P (type 3063, 3285), M58P (type 3258, 4084, 4087, 6138 Desktop (4GB DDR3-1333 PC3-10600 240-pin DIMM) Capacity: 4GB Form Factor: 240-pin DIMM Type: DDR3-1333 PC3-10600 (non-ECC) Chipset: 2Rx8 16c 1.50V CL9