CPU-Z

CPU-Z is an advanced hardware metrics gathering tool. Essentially, it can pull all the information you will ever need to know from your hardware. CPU-Z is the original program in its genre, and the experience of the developers shows.

Even for very specific hardware, very abstract details are displayed. CPU-Z is ideal if you're missing drivers or happen to need this specific information. It's also great for figuring out exactly what you need to replace an existing components.

There are really no cons to CPU-Z. It's fast, easy to use, and free to use (although the developers regularly request donations).