Not sure - give OCCT a try and see if it says the same thing while you're running the CPU stress test.
Just finished stress test with OCCT, 100% the temps are near the same. 39-46c.
I mean what did it say your clock was in the lower left . Thought that was one of the questions.
What are you using to test your temperatures? I suggest running core temp or real temp.
Also, for a CPU overclock you should try prime95 large fft test, which will probably bring your temps over 40C - which is why I'm asking to make sure you are using a reputable temperature measuing program.