Common issue. I have seen no solutions yet.
You using fixed voltage (always at 1.32 ?) so that it runs at that voltage all the time ?
Or using offset method where it can throttle down when not needed ?
Latter is recommended. Good comments here:http://benchmarkreviews.com/index.php?option=com_content&task=view&id=730&Itemid=38&limit=1&limitstart=9