Intel's max recommended voltage for the SB CPU's is 1.52 volts. I realize that the Intel engineers know more about their chips that I do, but considering that the max recommended voltage for a 45 nm CPU is 1.425 volts, 1.52 volts seems high for a 32 nm CPU.
It has been my experience with Intel quad cores that with any conventional cooling system, a quad will bump into the thermal limits before it reaches the voltage limits. Your core voltages are good. Although I think your load temps are a little high, they are also OK.
Question. I have an h50 cooler on my cpu(2600k) is 1.376 volts to much for a 4.6 clock speed? My idle temps are around 34, and my full load temps are around 75 give or take.
I have a 2500K and can run 4.6ghz at 1.355v which was accomplished on air cooling with a Thermalright 120 Extreme Cooler.
Take a look at mrface's 2600K CPU-Z validation specifically at his voltage used, what's wrong with this picture when you compare his established 5.1ghz results with you using 1.376v for a 46x multiplier?
The generated heat is in direct relation to the overclocking method you choose to use, there are various ways to overclock the Sandy Bridge CPUs, some using all Intels features, some partially using Intels features, and some using basically none of Intels features.
The latter method, the overclock guide I wrote is a maximum heat generating method, which in the beginning was very frustrating attempting to keep it cool enough to run all 4 cores without throttling, below is my cooling solution.
I'm not suggesting you take that route, but just so you can see what I tried that didn't work, and some of those that didn't make the grade are better coolers than the H50, like the Rasa 240 loop and the Thermalright 120 extreme with 2 2000rpm fans in push/pull.
As far as cooling goes, I wonder if my decision to use only 1500rpm fans versus the 2000 rpm fans that came with it was a bad idea? I swapped the fans out because it would be quieter and the 1500rpm fans I chose had a higher cfm.
I saw the link you provided with mrface's cpu-z validation, and i get how my first post sounded. How can he have lower volts, lower temps and a much higher ratio.
The problem is that all CPU's are a little different. A CPU chip with a relatively low VID (Voltage Identification Digital) voltage tends to be a better overclocker. The VID voltage is basically the "supply" voltage for that chip. It is the voltage that the CPU chip programs the power regulator on the motherboard to deliver. The actual supply voltage will vary in accordance with the changing load.
Two CPU's built from adjacent dies on the silicon wafer can have different VID values, and therefore different overclocking capabilities.