Well I can only say that I experience the same. I got an i5-3570 that boosts all the way to 4.8 Ghz after I installed a new water cooler without touching a thing in BIOS. I was a little worried in the start too, but you shouldn't worry. AS long as you don't experience heat problems or performance problems, then it's just fine. http://peecee.dk/uploads/022013/Unavngivet16.png
- Here you can see the strange results.