PDRAM: A Hybrid PRAM and DRAM Main Memory System

In this paper, we propose PDRAM, a novel energy efficient main memory architecture based on phase change random access mem-ory (PRAM) and DRAM. The paper explores the challenges in-volved in incorporating PRAM into the main memory hierarchy of computing systems, and proposes a low overhead hybrid hardware-software solution for managing it. Our experimental results in-dicate that our solution is able to achieve average energy savings of 30 % at negligible overhead over conventional memory architec-tures