TwinMOS PC3-12800U Ram.
•Capacity Options: 4GB.
•Memory Type: DDR3.
•Speed / Frequency: 1600 MHz (Peak transfer rate of 12,800 MB/s).
•Form Factor: 240-pin UDIMM (Standard desktop computer DIMM).
•Voltage: 1.5V (standard DDR3) or 1.35V (DDR3L low voltage).