AMD K10 Quad B2 needs 1.08V for 1.6 GHz
 

We managed to find out that the latest revision of the K10 only needs 1.08V to work at its lowest 1.6 GHz clock. You need to get the voltages all the way to 1.38 to get the K10 Quad core to work at the desired 3.0 GHz speed and probably even more in order to make it pass the magical 3.0 GHz barrier.

http://www.fudzilla.com/index.php?op...79&Ite mid=35