Speccy

Speccy is one of those programs, that, at first sight, you may think it's not useful for you, but it can actually solve many problems and save you a lot of time.

If you want to buy new components for your computer because you want to power it up, you'll need to know some specifications having to do with the motherboard model or a number of empty sockets.

Speccy - System Information is a lite program that offers information regarding your computer: System, motherboard, RAM, HD, graphic, external devices,...

Finally, it was created by the developers of CCleaner and Recuva, so it is a trusted program... and free.