6700T overclock - Too much voltage?

[DarcMass]

overclk - Album on Imgur

 

I've managed to overclock my 6700T, but I was thinking if 1.42v is too much voltage for a 4.4GHz overclock.

and stress-testing, it drops to 1.36 (in cpu-z). If I raise the clock more, I get blue screens (clock watchdog). My question is, is it safe for 24/7 use?

[Clear Skies Production]

what motherboard do you have? I have an asrock motherboard on version 1.30 and it works fine. I get a 3.5ghz overclock easy