A comparative study of MAC architecture with an energy efficient algorithm is proposed in this book.This novel technique is implemented in various architectures to enhance the performance of the system. Through the "Comparative Analysis of Different Multiply Accumulate Architecture" is planned to obtain an efficient performance parameter such as gate count, delay and power for the different MAC architectures. The MAC architecture is designed using MODEL SIM and simulated using Xilinx ISE 9.2i and the parameters is compared to obtain an efficient architecture.