Abstract: Full adder is an essential component to design different digital systems and it is used in wide applications like microprocessor and microcontroller and also digital signal processors. There is a high command in electronic devices and circuits, and then it requires low power and high speed. Here, the present paper illustrates the significance of power, delay and a transistor count. The investigation and outline of 8TMGDI full adder style is observed. This full adder is maintaining some low power complexity. The presentation and application of the modified gate diffusion full adder are compared to other full adders like CMOS and GDI. The simulation results of the 8T modified gate diffusion full adder shown better power and delay values, when compared to the other full adders. This paper gives the best results in the low power technology. In 45nm Technology virtuoso tool, the proposed full adder is designed and compared.