AddOn 2GB DDR3-1600MHz UDIMM for Lenovo 0A65728 - DDR3 - 2 GB - DIMM 240-pin - 1600 MHz / PC3-12800 - CL11 - 1.5 V - unbuffered - non-ECC - for Lenovo S500; ThinkCentre E73; M72; M73; M78; M79; M83; M92; M93; ThinkStation E31; E32.