1 GB DDR3 3200 SO-DIMM 1Rx8 1.2 V.is designed for 3200 MHz to maximise data transfer efficiency through a higher bandwidth of up to 25.6 GB/s.1.2 V, thus saves up to 40 percent energy.Frequency speed – 3200 MHzVoltage 1.2 V260-pin SO DIMMDurable Construction