Overclocked AMD FX-8320 70C @3.8Ghz

Make sure you're reading the right set of temperatures. Reading CPU temperatures is really a sort of art, since it is kind of a convoluted process; there are two sets of temperature readings: the CPU Core and CPU Socket. The CPU Socket temperatures are great for reading idle temperatures, but usually read 5-15C higher when at load. The CPU Core temperatures, being affected by a type of "weighted equation" produce accurate temperature at load, but weird, often sub-ambient temperatures when at idle.

If you have a Radeon GPU, AMD Overdrive is pretty good for CPU core temperatures. Coretemp should do the trick too. HWMonitor will usually tell you both, but you'll want to cross-reference so you can make sure you know which is which.