The lightning increase in demand of computational power consumed by modern applications has made us to shift for Cloud Computing Model which has led to establish very largescaled virtualized Data Centers. Such Data Centers consumes huge amount of electrical power which results to high Operating cost and Carbon-di-oxide emission.The servers in Data Centers consume/waste a substantial amount of energy/power. Since servers are deployed and configured for peak capacity, performance, usually at the expense of efficiency. Such waste increases the capital and operational expenditure which can result in power and space being exhausted, which creates a situation where the organization may grow in data centers.Consolidating and Virtualizing servers can increase overall utilization of resources from 10% to 30%. The rapid reduction in capital and expenditure can motivate many organizations to virtualize the servers.