In the era of High Performance Energy Efficient Computing (HPEEC), the focus of research is again shifting for Eco-friendly design. Eco-Friendly design is a environment friendly design which has achieved energy efficiency in signicant amount. In this work, we applied 3 clock gating techniques (Latch Free, Latch Based, Flip-Flop Based) on 3 ALU(Synchronous, Asynchronous and Global Reset) to find the most energy efficient techniques out of 6 combination under consideration. Then, we try to get the benefit of 28nm technology in term of energy efficiency, which delivers twice the gate density of...