So, I've never really seen it as a "Issue" but I've been rendering videos in Sony Vegas for YouTube, and I recently checked my CoreTemp program, and all 4 cores are stressing at about 95celcius when under stress by the program. Keep in mind, that I have a i7 2600k 3.4Ghz Processor. I only stress it for about 10-20 minutes, and it's only once a day. I've been looking into getting a better equipt processor and Cooling fan, because as of right now I only have the Stock fan on it, and I need to change the thermal paste, it's been a few years 😛
Here's a Picture of my CoreTemp program currently while rendering: http://i.imgur.com/QHQLLqk.png
Here's a Picture of my CoreTemp program currently while rendering: http://i.imgur.com/QHQLLqk.png