@tsarstepan,
It doesn't matter so much "what it is" as "how hot it is".
Are you familiar with CPUID's utility that shows all the details about a CPU?
They also make a utility called HWMonitor that measures various things like temperatures in your computer.
http://www.cpuid.com/softwares/hwmonitor.html
The pay "pro" version isn't necessary. The free version works just fine.
You will want to look at the internal temperatures for your CPU and GPU.
When a CPU/GPU is doing intense calculations, a temperature of 60 degrees Celsius starts to slowly damage a chip's circuits.
Doing non-stop calculations at a temperature of 70 degrees Celsius will shorten a chip's typical lifespan to two-to-six years.
Doing non-stop calculations at a temperature of 80 degrees Celsius will shorten a chip's typical lifespan to one-to-three years.
Doing non-stop calculations at a temperature of 90 degrees Celsius will shorten a chip's typical lifespan to six-to-twenty months.
Then again, if you plan to upgrade to a new computer after a certain period of time, it might not matter if your current one wears out just after you stop using it.