ugh, here we go again.
Different MB's read socket-A temps differently. There's no way to cross-compare different MB's. Comparing across the Same MB remains extremely difficult, but can sometimes give you a baseline of "norm" temps.
Socket-thermistor "readings" on the norm can be anywhere from 5-10C off for a higher reading MB, to 15C-20C off for a low reading mb. its impossible to compare due to the differences of MB thermistor placement and Manufacturer implemented compensation.
That being said, Bthorny, what are you system temps (the other reading on an 8k7a). Depending on that, i'm gonna guess your temps are very much "normal" for a 8k7a.
Mike