Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

While comparing the behavior of my new laptop(a toshiba portege r705) running under Ubuntu (10.10 64 bit with kernel 2.6.35) and Windows 7 I noticed that in Ubuntu it

1) Ran hotter

2) Seemed to have worse battery life.

Looking more carefully it seems that in Ubuntu the minimum frequency the processor runs at (a core i5-460M) is 1200MhZ while in Win 7 CPU-Z was giving lower frequencies during idle times. Running cpufreq-info in Ubuntu gave the lowest possible frequency as 1200MhZ (which was also the lowest supported by hardware).

My question is whether this is the correct frequency, an if not whether it can be made lower. Note that I'm not super familiar with linux but much prefer it to Windows (I used to own a Mac).

share|improve this question
up vote 0 down vote accepted

This is the minimum clock rate under normal operation. Unless the clock multiplier is unlocked (normally needed for overclocking, but also for underclocking), which is not the case with the Core i5-460M, you cannot manually lower the clock rate below 1200 MHz.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.