The evidence is in not (as it would seem) so common sense and...
I gave you charts and everything... also less common sense, as temp goes up, resistance goes up too, you need more pressure (voltage) to overcome the increased resistance, and that increases electromigration, that decreases the time before the CPU fails.
for more info
To use Black's equation, the component is put through high temperature operating life (HTOL) testing. The component's expected life span under real conditions is extrapolated from data gathered during the testing
So to speed up killing the chip, they run it hot. What more could you need.
Now I am sure you will say... but intel but the throttle at a safe temp blah blah.
Intel also speced the chip to run what 3.7ghz @ like 1.24 volts? One can assume the throttle is nothing more than a fail safe for a fan failure (after all it would suck for a server to go down, or a chip to fry cause a $5 fan died). One time throttling won't kill the chip, extended runs at full temp will hurt.
Oh ya your car likely has a fuel shut off over the redline, I dare you to drive it at that RPM non stop bumping the fuel shut off.
Note I am not responsible for any damage you do by running the car at red line.
Run it as you like, but stop telling other people that super high volts are okay. hell head over to »www.overclock.net
and ask them about your voltage and temps 90% of those guys will say too hot... and that whole site is about overclocking and pushing.
OP your choice, 99% of people unless doing a suicide run (yep that is what it's called) will not over volt that much and over temp that much. At least not for 24/7 usage.