If you need to test your computer's performance to ensure it is running at optimal capacity, then it is a good idea to run a stress test and analyze the results. StressMyPC is a small, lightweight and useful tool for the job. It actually does not require any installation, so you can run it directly from a USB drive on the computer you need to evaluate. StressMyPC has a simple and straightforward interface, which gives you the option to choose what type of test you want to initiate. It doesn't provide a lengthy description of the inner workings of each process, rather a brief one.