I can tell you it didn't on my new build that I put together right before Christmas. At anything over about 4.2 Ghz my 2500k needs to get close to 1.3v, and the temps under full load were close to 80c. At 4.5 they were over 80c. Shut her down fast that time. And this is in a good CoolerMaster case with two front 80mm, a back 80mm, a blowhole vent, and a side 120mm.