How many volts are in the ddr1 ddr2 ddr3 pictures?

DDR1 operates at 2.5 volts, while DDR2 uses 1.8 volts. DDR3 further reduces the voltage to 1.5 volts, with some variants supporting a lower voltage of 1.35 volts. Each generation of DDR memory has been designed to consume less power while improving performance.