I would consider that an excellent example. Wanna sell it?

I had mine at 1.25V for 4.00GHz, and I didn't fully stress test it. Currently it's at 4.20GHz using 1.368V (measured under load with CPU-Z).

It failed Prime small FFT's at 4.33GHz using 1.392V, and I don't want to take it past 1.4V, so there ya go. I think I can cope running at approximately 4.2GHz for 24/7 daily use. I wouldn't consider 1.368V unsafe and I doubt it will degrade over time. It would be nice to have an insane clocking chip but let's be realistic. Only lucky people get them. Personally, when it comes to getting good clocking CPU's, my luck has been terrible for 4 years straight.