The described technology provides a method for dynamically adjusting operating voltage of a device, including receiving device characteristics data related to a device, performing a margining test for the device to generate a performance curve characterizing variation of the device's current performance speeds at various operating voltages from expected performance speeds at the various operating voltages, determining an operating voltage for the device based on the device characteristics data and the performance curve, and adjusting the operating of the device based on the determined operating voltage.