what about stress testing it?, or playing a game to see what the temperatures go to then? That temp is fine but you will only know if its ok until you test it properly. Also in some bios settings there are adaptive options that only increase the CPU output when its needed. You may have this setting on permanently.
Now my vcore is 1.150 and 4.5GHz and I have do a cpu strees test using Aida64 extreme, the average temp will be around 70 mid and max i see is 81 or 82 for few second then it gone back to 68 to 70 mid.
Is there anything i need to imporve?