CPU Power Bench is an automated benchmark tool designed to accurately generate power estimation models for various Single-Board Computers (SBCs) such as Raspberry Pi, Asus TinkerBoard, etc. This tool stresses the CPU with variable theoretical loads, then collects data on CPU cycles and measures the power consumed by the device for each load. CPU Power Bench automatically applies linear and polynomial regression algorithms on the collected data to generate power models, as we have observed a correlation between CPU utilization and power consumption in SBCs.