One such software is CPU-Z, another (for more detailed info on the graphics part of it) is GPU-Z, both can be found in my signature.
I was going to mention it if necessary (I was keeping it simple), but since it has been mentioned, I do recommend the "Zip" download instead of the "Setup":
ftp://ftp.cpuid.com/cpu-z/cpu-z_1.71.1-en.zipThe "Setup" installs it, but this program doesn't really need to be installed, hence the "Zip" option. You just download it, double-click it, and extract the files inside to a location of your choosing. Then, you open the program. That way, you don't have to worry about other programs or things getting installed along with CPU-Z.
When you go to open CPU-Z, you'll see a 32-bit version and a 64-bit version; if you have a 64-bit version of Windows, then you can open either of these. If you don't have a 64-bit version of Windows, then you can only open the 32-bit version.
GPU-Z isn't really necessary for this anymore because CPU-Z now has a "Graphics" tab. Sure, it has its uses, but for this, all we need is the Graphics tab in CPU-Z.
Note: The link to the "Zip" download on their page is incorrect. It points to the Setup version. If it were correct, then it would bring you to this page:
http://www.cpuid.com/downloads/cpu-z/cpu-z_1.71.1-en.zip