You probably know that heat is bad for your computer, and you might even know how to monitor its temperatures. But how hot is too hot? Linus from Techquickie explains in this video.
First, it's important to remember that your computer doesn't really have one "temperature" -- each component runs at a different temperature, and each of them can withstand different levels of heat. The manufacturer of those components usually lists safe temperatures in the manual or on its website. For example, Intel's current generation of i7 processors can get up to 105C before they will turn themselves down to avoid problems, while hard drives tend to have a lower safe operating temperature (70C for the example in the video).
Under normal usage, most people shouldn't come even close to these temperatures, unless your computer is very dirty or in a very hot room. If you're overclocking your processor or graphics card though, you're much more likely to see these high temperatures, so knowing these values is important. I usually like to stay at least 10 degrees below them to be conservative.
If your computer's running too hot, try improving your cooling. Check out the video for more.
Safe PC Temperatures As Fast As Possible [Techquickie]