For the FX-8350 that voltage is normal, sadly.
I use CoreTemp, it displays on AMDs weird values, I tried offsetting the value with the socket temp but it didn't work that well.
I do use hwinfo64 as well, but it also displays AMDs weird values, there is not much a software can do if the sensor is putting the values off.
AMD seems to use this strange way to measure the temps because it's supposedly more accurate. But not much use if you don't know what to relate it to... I might increase the voltage just a bit more, I can't go above 1.55 so I'll leave it at 1.45, should still be safe!
The thermal take I'm using is Arctic Cooling MX-2, I'm not sure if the one that came with the cooler is better or not, but this one is very good. About your temps, can I assume 65ºC is a safe value?
The Sabertooth should be able to handle the power with no problems! About the voltage, I was able to run it at 4.5GHz with 1.38v stable. It currently runs at 4616MHz at 1.392v if only I could keep the voltage stable it wouldn't be set at 1.42v, running at 1.428v when idle
The mobo has 8+2 power phases and a heatsink so that's ok
Finally Thank you all for the help, I'll try to go for a stable 4.8GHz when my Cosmos II case arrives. This is not a new build by any means, it was rushed when my old PC died mode than a year ago, I had little money and the sabertooth to spare. So now that I have a job I can finally upgrade it Now, if only I could mark more than one post as the answer, because really, it was the combination of them that helped!