I have a link in my signature that shows my hardware and it's performance. I personally like userbenchmark.com because IMHO it shows accurate performance based on how you chose to setup your gaming PC. The benchmark test is a simple download of their file and closing whatever programs you are running. Then launch the test by double clicking the file. Nothing installs on your system. The apps interface is simple and shows what hardware is being tested at each stage of the benchmarking. The entire test takes about 3 to 5 minutes depending on your system's speed. Note: REMOVE any Flash Drive from USB ports before opening the file.
This is the actual URL to my account at their site (an account is not neccessary). I recommend that beginners to experts use this site's benchmark file. This test is not meant to stress the components to their limit for a long duration. It's purpose is to push each component to it's limit for a short period. A good way to understand how well your components are holding up over time or to test any upgrades and tweaks made to the system.