First - don't believe Anandtech.
Secondly, yes, they don't need as much voltage because, essentially, the wires are smaller, which leads to less resistance. That leads to it also being cooler.
Who ever runs them at 45nm CPU voltages and then calls them fragile shouldn't be posting CPU reviews. Because that isn't how it works.
If you run them at their advertised voltages they will last just as long as a 45nm CPU, 10-20 years. For instance, the MAX safe voltage for a Sandy is like 1.5 volts, but for 45nm chips it can be all the way up to 1.55 volts.
EDIT: I think I should justify all this voltage talk. Te reason I am going into this so much is because a Clarkdale (i3) is more of a low end CPU and not really meant to be overclocked at all. So no wonder it doesn't last long at 4.2GHz, the voltage it would need to do that would be too much for it. Also, that was a new architecture, where as Sandy bridge is a refined 32nm architecture and will last longer.
Edited by snelan - 7/30/11 at 6:05pm