To download and use benchmarking software, you should first identify which component you want to test—such as your CPU, GPU, or overall system stability—and then download the appropriate tool from a reputable source like the official developer's website or Steam. Popular Benchmarking Tools and How to Download Them
Depending on your needs, different industry-standard tools are available, many of which offer free versions: PC Speed Test Tool - Compare Your PC - UserBenchmark how to download benchmark