My cpu overheats when rendering Rendering seems to have a high toll on my computer. I render with my gpu but it is my cpu that overheats. I guess the cpu is conected someway even though i dont know in what way. 
So i wonder if there is a way to limit how many cores is being used when blender renders? Is there something else i can do, the more i can do the more potential to reduce the temperature there is.

I havent tried anything because i dont know what to try!
There is an addon known as auto tile size which comes with blender you just have to enable it in blender user preferences you can limit how many cores are used for rendering and it also offers advance sizing options.
If still this doesn't works you may reduce voltage given to your cpu and limit its rpm speed in your computer's bios