As above, enable C1E and Speedstep and your idle voltage will come right down. I run it enabled at 3.6ghz with no ill effects.
Your temps at load are fine, so long as you are using Small FFT's to really heat things up. The only one that would cause me concern is the PWM temps, but they are still within tolerable levels. You might want to add a fan in there though. A little 60mm fan will make about 10c or so difference at load. Removing the heatpipe and replacing the thermal tape with Ceramique will take another good few degrees off load temps.
Your temps at load are fine, so long as you are using Small FFT's to really heat things up. The only one that would cause me concern is the PWM temps, but they are still within tolerable levels. You might want to add a fan in there though. A little 60mm fan will make about 10c or so difference at load. Removing the heatpipe and replacing the thermal tape with Ceramique will take another good few degrees off load temps.