The demand of high performance and low power has increased the importance of power efficiency in multi-core systems. In modern multi-core architectures, DRAM has dominated the power consumption and therefore reordering based DRAM scheduling has been intensively studied to reduce the power. However, the benefit of reordering is not fully explored by the previous studies. To further reduce the power, this paper proposes the read-write reordering and the read-write aware throttling. When compared to the existing work, the proposed techniques reduce 10% more DRAM power with less performance degradation.