Athlon II X2 250 overclocked to 3.9GHz with the Vcore increased by 0.175V above the nominal and remained absolutely stable throughout the tests.
In this case we increased the integrated North Bridge frequency up to 2.6GHz and its voltage – by 0.1V.
This is a very good result, showing that dual-core AMD processors on 45nm cores will overclock way better than their triple- and quad-core fellows. The results of our Phenom II X2 550 overclocking experiments confirm this assumption as well. This processor remained stable at 3.98GHz frequency with the core voltage increased by 0.15V.
The North Bridge built into this CPU overclocked to 2.43GHz. Note that Phenom II X2 550 belongs to the Black Edition series that is why we could also tweak its multiplier alongside with the clock generator frequency.