In one example in accordance with the present disclosure, a method may comprise collecting environment information for a processor, determining a maximum power level for the processor and setting a frequency level and a core-to-frequency ratio that maintains the maximum power for the processor. The frequency level and the core-to-frequency are respectively controlled by a programmable frequency register and a programmable core register. The method may comprise receiving a die temperature corresponding to the processor, determining that the die temperature exceeds a temperature corresponding to the processor and adjusting the maximum power to a level that maintains the temperature.