"SIW is an advanced System Information for Windows tool that gathers detailed information about your system properties and settings and displays it in an extremely comprehensible manner."
Skipping the sales pitch, it's a free hardware diagnostic tool I always carry with me on pc repair jobs.
I use SIW mostly for finding out what hardware is inside without opening the case.
It's the best system information tool I have ever seen, and I have looked through most of them.
If you would like to add SIW to your arsenal, go here: