The absolute maximum voltage for Sandy Bridge i7-2600K CPUs is 1.52V, and is the same for an Ivy Bridge i7-3770K, 1.52V. The internal voltage controlling mechanism of these CPUs should not allow higher voltages than that. While they can be operated at this voltage level, it is not fine to do so, it's like running you car engine at its maximum RPM, and 200KPH constantly. I know you're using DICE cooling, but unless you know how, or can, override the CPU's VID control, you can't go beyond 1.52V.
This is even more dangerous for Ivy Bridge CPUs, which run warmer and are internally more delicate than Sandy Bridge CPUs. You may find voltage level settings above this in the BIOS or a tuning utility, but that does not mean they can be safely used, or used at all. Recommended safe max voltage levels for IB CPUs like yours are ~1.3V. Yes I know, that's not for extreme over clocker's.
The OC utility running at 0.60V at start up is not good. I don't use that program, it seems it does not have an Apply button, everything is done in real time? Is it set to Autorun when the OS boots? If not, that might be why it does not pick up the actual CPU voltage. There might be a BIOS setting you have set that causes that. Otherwise, the program is not working as it should be, it must read and apply the current CPU settings, not doing so is a major bug.