How to give maximum CPU load using website?

Question

laptops

One of these days it will be necessary to test the noise of the fans inside the laptop. To do this, you need to overclock the CPU to the maximum and make it work at high speeds for a couple of minutes. The laptop is in the store, you can’t install third-party software, but no one will say anything if you go to a couple of sites through a browser. The question is, is it possible on some site to load the car enough to make the fan work. Maybe there is a special sites just for checking loads and all sorts of benchmarks that can cope with such a task?