I'm a bit curious about my processor. It was an i5-2520M advertised as being 2.5GHz with a turbo freuqency up to 3.2GHz, but in Linux it's constantly going above 2.5GHz. Everything reports it as being 3.2GHz stock.
Even on battery it's reported as being 3.2, and I'm pretty certain it's decreasing battery life. Is there any tools/etc. to keep 3.2 on AC power, but reduce it back to stock 2.5 on battery?