the old fashioned way is the best way...
I gave up on those S/W sensors long back...there are other more important thiings in life to worry about beyond keeping a constant worrisome eye on your system temps

Install a CPU...
Load it 100%for 10 mins and check the heatsink with hand...
If it's too hot or too cold (= no heat tarnsfer), somethng is wrong..if not, just shut it and forget it till the next upgrade(or at least until you start getting some weird slowdown/BSOD issues)
And if you do, repeat and rinse...