Windows only: Planning an upgrade soon? Save yourself the web searches for your specs and download Speccy. Speccy does a quick scan of your machine and gives you a complete rundown of every piece of gear that's in your computer.
Upon first glance, Speccy seems like something that's only attractive to power users, but it can be useful for anyone. When the Device Manager doesn't give you enough information about what kind of RAM you have (say, if you're looking to upgrade), Speccy will give you all the information you could possibly need, including the RAM type, how much you currently have, and even the number of slots used so you can buy with confidence.
You can view your computer's information in a brief summary (as shown), or click on any of the categories for a very, very detailed report. Speccy gives you detailed information for CPU, motherboard, graphics, hard drives, optical drives and audio, all so you don't have to go searching somewhere else to find out what you have. In addition, it also gives you real-time information on things like bus speed, DRAM Frequency, and temperature, to name a few.
Speccy is a free download, Windows only.