I havent yet, but i do plan on overclocking this system when the watercooling arrives, thats is why i wonder about the voltages. So far it has been 100% stable through all the benchmarks i have run and several games.
If you really get into it, fluttering voltages can knock your overclocking capabilities down a notch. If you push your CPU to the max and a low power swoop comes in and underpowers your system, your CPU won't have enough voltage to process stuff in time, causing it to hardware-crash. A high-watt PSU (power supply unit) will solve that problem if you encounter it. But my voltages flutter a lot (350W PSU) and I've managed to successfully OC from 1.8Ghz to a stable 2.3Ghz, so who knows?
Thanks for the reply's. I am running a 550w antec psu so i don't really know what else to do except possibly get another psu to run the hard drives, fans, optical drives etc off of if i start have stability problems due to the voltage when i overclock.