There are some gadgets that you do not realize you want or need until you stumble on them. These are the things that you have “made do” without using all kinds of methods. We had one of these moments the other day when an unexpected package was delivered. Upon opening it we found a new product from Thermaltake. It was simple labeled Dr. Power II. My first thought upon seeing it was that it was like the Kill-A-Watt power testers we use to determine power draw from the wall. We could not have been more wrong. The Dr. Power II is a Power Supply tester. With it you can test the nominal voltages from each rail and the PSU as a whole.  With a retail cost of only $39.99 it can be a very valuable tool in any DYIer’s home. Let’s take a look and see if it is worth the $40 you will spend on it.