Originally Posted by fateswarm
I've no idea about Ivy Bridge but Haswell is known to degrade on 1.35v on high loads for prolonged periods of time. It might be ok if you are into being risky though. e.g. If I had a Pentium-K I would go up to 1.45v or 1.4v since I wouldn't care as much about price.
That was about the ~1year periods we could observe now. All voltages/chips degrade eventually anyway. Nothing is 100% safe in the universe.
Ivy is almost certainly good @ 1.4v @ 70 % of usage cycles under max load for several years... Intel specifically said this to an oem that sold 1.4v 4ghz ivy prebuilt
Haswell is also 22nm
at least by O'sk00 Overclocking knowledge, if the manufacturing is the same, you use the same max voltage..