This user guide describes the PowerPlay Early Power Estimator (EPE) support for Arria®II, Arria V, Cyclone®III, Cyclone IV, Cyclone V, HardCopy®III, HardCopy IV, Stratix®III, Stratix IV, and Stratix V device families. This user guide provides guidelines to use the PowerPlay EPE at any stage of the FPGA design and provides details about thermal analysis and the factors that contribute to FPGA power consumption. You can calculate the FPGA power with the Microsoft Excel-based PowerPlay EPE spreadsheet or the PowerPlay Power Analyzer in the Quartus®II software by entering the device resources, operating frequency, toggle rates, and other parameters into the PowerPlay EPE spreadsheet.