My chip as stuck sensors too, and I can bench at 4.5GHz (with less than 1.5v cpu) on air so it's not exactly a duff chip. I considered sending it back but decided it wasn't worth the hassle. Once I start stress testing they all level out at the top, but 3 of them don't go under 40C. Luckily, one of them works all the way down to my idle which is about 27C.