the whole point of a load test is to push the hardware to a level unattainable by normal games and programs. this is to test the stability of the cpu and gpu even under the harshest of conditions.
simply put, in normal use, you will never experience such a load during gaming
also, there is this thing called thermal throttling, whereby once the components reach a certain temperature, they would lower their performance such as to not exceed that temperature since failing to do might result in permanent damage to the component.
so, even if for some reason you're going to put such a load on your cpu and gpu, don't worry
watch these videos to learn more:
[video="https://www.youtube.com/watch?v=VuP6I0mOb1s"][/video]
[video="https://www.youtube.com/watch?v=kUyuKqIfMN0"][/video]