Yes, due to crappy TIM between the die and IHS.
Also - what version of Prime95 (is it using AVX FFTs?) and what Vcore?
Huh, then that is a little high IINM.No OC, stock volts and Prime95 v277
There are probably 10 threads in the past 3 pages on this very topic. Looks a little high even for an Ivy (try reseating your heatsink) but Ivy Bridge is designed to handle those kind of temperatures. Don't worry.