1. INTRODUCTION

2. BACKGROUND
2.1. GPU Terminology and Sources of Power Consumption
2.2. Need for Improving Energy Efficiency of GPUs

3. RESEARCH WORKS ON ANALYZING GPU ENERGY EFFICIENCY

4. TECHNIQUES FOR IMPROVING GPU ENERGY EFFICIENCY
4.1. Overview
4.2. DVFS Based Techniques
4.3. CPU-GPU Work Division to Improve Energy Efficiency
4.4. Saving Energy in GPU Components
4.5. Dynamic Resource Allocation Based Techniques
4.6. Application-specific and Programming-level Techniques

5. FUTURE RESEARCH TRENDS AND CONCLUSION