title: Modifying PROCTHROTTLEMAX with powercfg has no effect in 2008 R2
body: <p>I am trying to make the CPU transition to a lower P-state. I used pwrtest to determine the tests, and now I want to set the processor frequency to 50%.</p>
  
  <p>I executed the following command:</p>
  
  <pre><code>powercfg -setacvalueindex SCHEME_BALANCED SUB_PROCESSOR PROCTHROTTLEMAX 50
  </code></pre>
  
  <p>When i query the scheme, the value is set to the desired value. However, the processor frequency is not modified (I am using CPU-Z to check the frequency).</p>
  
  <p>My system is running Windows 2008 R2.</p>
  
  <p>Any ideas?
  Thanks!</p>