lol cheers for all the help, im using everest and coretemp for temps anyway and they seem fine
Currently stressing 3.6ghz (400x9) with a max of 55°C on any core at any time, but on average its 51°C/52°C

so im pretty happy. Wouldnt boot at 3.8 and 3.7 failed after like 2 mins.
Guess i will have to up voltages to get it booting higher? I've researched a litlle on voltages but its alot to take in!
thanks for the help