There are three ways to find out about your computer hardware.
The first way would be to examine it, a method which I personally consider to be a bit too hands-on and messy for everyday application.
The second way would be to read the manual that came with it, but let’s be realistic… who actually reads those things, much less saves them? *Raises hand then slinks away guiltily.*
So that leaves us with the third option, which is to ask the software. Because what knows more about the hardware, than the software interacting with it?