AIDA64 temps wildly different to hardware monitor temps

[nadimsadeeq9]

While AIDA 64 shows 50 degrees Celsius when being stressed, HWMonitor shows 90 degrees Celsius! Which one is correct and why are they so different?
CPU: AMD A10 7870k OC’d to 4.6 GHz (from 3.9)

 

[Dunlop0078]

Aida64 is probably right. 90c would likely kill that CPU. Temp software when it comes to older AMD processors is notoriously inaccurate. I would try AMD overdrive. It measures thermal margins, you don't want the thermal margin to go into the negatives.