Interesting. Now I can't wait to get home and test, lol.
I got two Sandy Bridgers -- both capable of 4.7 under my personal choice of temperature and voltage targets. The 2700K runs at the same voltages as the 2600K @ 4.6.
There was a chip lottery, and some folks have been able to clock the 2700K @ 4.8 for 24/7 and reach 5.0 or higher on water-cooling (even an 2xfan AiO). I'm a cautious sort, and if I don't like the next voltage step or IBT-Max temperature -- I don't like it.
If you are that eager and chomping at the bit, suppose you post your results? For volts -- a linpack or IBT minimum load/turbo voltage mid-iteration. Package temperature, avg-of-maximums, or lead-core peak when the test is in the middle of an iteration. What type of cooling -- make/model air cooler/AiO or just radiator size?
I confess, I'm collecting info on those Devils Canyon chips. I'm lookin' at next year for a Haswell E, and I could make a change of plan.
It's easy to develop something like "goal displacement" and make projects for over-clocking just for the sake of nominal Mhz scores. It costs more to acquire computer-power in excess of what you could use in multi-purpose concurrent-running applications.
The DC's are looking better and better. I've even acquired a used-un-abused 3570K this year without deliberate intention for it. I figure -- what's the hurry? Stocks, flows, debits, credits -- etc. I need to set up some Ebay offerings, when I have something big enough to sell replaced by something better.