TDP on Intel cpu's like the 3770k,4790k etc is 100-105w. That's the barrier. At a thing over that barrier, the cpu will first try to throttle back, lowering speeds and voltages to the point where slowdowns are obvious. It do this as long as it is successful. As soon as it becomes unsuccessful, the cpu will automatically go into thermal shutdown. You won't be able to accurately measure anything like 135, because self protection will shutdown the cpu long before that.
Software readings are somewhat different. According to SpeedFan, Hwinfo64, my Temp1 reading from Isa Bus 202 (I think that's the right number) is currently at -124°. That's physically impossible without LN2. It's not a bad sensor, its just that software is only so good...