If you are a Windows user, then you might already heard about Speccy. The Speccy is developed by Piriform, which another famous freeware software is CCleaner.
Speccy will give you detailed statistics on every piece of hardware in your computer; including CPU, Motherboard, RAM, Graphics Cards, Hard Disks, Optical Drives, Audio support, Network, Peripherals and Operating System. Additionally Speccy adds the temperatures of your different components, so you can easily see if there’s a problem!
Still, if you are not happy with Piriform’s Speccy then you can download CPU-Z to get the full PC information. It also provides the full detailed information about CPU, mainboard, memory, caches, graphic and SPD.