My 2600k @ 4.4Ghz runs to 1.25v on my current offset setting and I don't break 60C with it under intelburntest. xD
Do some studying on the voltage offsets and how they work. I can actually run 100% stable at 4.0Ghz at 1.15v fixed but at offset I have to let it get to about 1.2v to be stable at idle. These chips "can" handle 1.5v; but I don't suggest anything over 1.350v personally. I won't let my chip hit 1.3v in my rig either.
At 4.4Ghz I have the voltage offset down to -0.040v and don't break into the 1.3v range at all and it's stable as could be. The best thing; the temperatures with my 212 are better than they ever were at stock settings because my voltage even at this overclock is lower than it automatically ran at stock.