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* Dynamically adjusts CPU speed and voltage based on demand for CPU (idle/work ratio threshold is user-configurable) * Automatically detects available processor speeds * For normal operation, no configuration or options are necessary. Just run it! * Full multiprocessor and multi-core support. Automatically determines which cores need to be controlled together or separately (configurable) * Configurable minimum and maximum allowed speeds * Can minimize CPU speed and voltage if AC power is disconnected from the computer (requires ACPI) * Can maximize CPU speed if AC power is connected to the computer (requires ACPI) * Can minimize CPU speed and voltage if CPU temperature gets too high (Requires ACPI, temperature is user-configurable) * Can be told to lock CPU at minimum or maximum frequency via signals * "nice()'d" processes and those waiting for I/O will not increase CPU speed * Polling interval for CPUs, temperature and AC adapter configurable separately * Crash-proof frequency switching even if you have a very tempermental CPU and an obsolete version of CPUFreq (some AMD mobile Athlons in particular) * handles strange processors with lots of little steps * More that I'm forgetting.