Dr. Power III ATX Power Supply Tester/Support up to ATX12V v3.1 with PCIe 12+4pin Connector/Voltage Output for +12V, +5V, +3.3V, and +5Vsb, AC-069-OO1NAN-A1

This actually surprised me. Had a PSU I needed to test and couldn't believe this was on offer from Thermaltake no less. And at a very reasonable price. The readouts have been accurate and the fact that it includes full ATX 3.0 functionality with a 12VHPWR port is big win for this. Overall exceeding all expectations and well worth the price.

The best PX power supply tester that I have ever seen or used. It’s easy to use and has been a great help to verify that a power supply is in perfect condition and to identify a problem with a defective power supply. This is great for using to build a new PC to make sure I’m starting with a good PSU.

Instead of risking my computer with an old Corsair AX750 that had been collecting dust and spider webs for five years, I decided to invest in a Thermaltake Dr. Power III. And boy, am I glad I did! It failed the PG test spectacularly - displaying an “F,” the backlight turned red, PG kept flashing, and beeping loudly. Next, I used the Dr. Power III to test a brand new FSP Hydro PTM X Pro 1200W ATX 3.0 PSU. I plugged in everything: CPU, PCI-E, SATA, Molex, and even the 12VHPWR. They all tested good! The Dr. Power III uses the ATX 24-pin as its power source and displays all connections and their respective voltages on the screen. Testing is a breeze - just press the button to cycle through the tests or hold it for five seconds for auto-testing. During the tests do not disconnect or turn off the PSU as it can cause damage. The build quality of the Thermaltake Dr. Power III is superior to those cheap PSU testers. It’s lightweight and capable of testing the latest ATX 3.1 PSUs. However, it does feel a bit cheap due to its plastic construction and is more expensive. Despite that, I highly recommend the Thermaltake Dr. Power III if you have an ATX 3.0 or higher PSU and/or have multiple PSUs to test. It’s a reliable and efficient tool that makes PSU testing straightforward and hassle-free.

Great PSU tester

Thermaltake apparently tuned the PG test on this thing to be way too sensitive. This thing claims to be ATX 4.0 compliant, but it claimed that the Power Good signal on my ASUS ROG THOR PSU was bad -- only ever on the first bootup. After much handwringing, I decided to get a second opinion by buying a cheaper power supply tester (you know the one, it's those $12-$25 cheap units all over Amazon) and found the Power Good signal's response time to be *well* within ATX 4.0 spec. Also, when it fails, it just writes "F" to the screen but *does not tell you what value it was which failed*. This is bad design in my opinion - at least tell me, Dr. Power III, what number you think is bad! That said? Still giving it 4/5 stars for being fantastic in all other areas, and it has ports/features the other testers lack.

Quality when it’s needed. I had a bad psu and replaced it. PC still didn’t power on. I had one of those cheap testers and confirmed the old one was bad but the new one showed to be working. Tried an old psu i hade lying around and pc powers up. So on a gut feeling i bought this tester. Plugged in the new psu and tested and found that it did work… until it was put under load then the 5v would fail. The cheap testers didn’t have the ability to test this. If you are a computer tech or just build them for fun this is a must for your toolbox. Save a lot of time and headaches.

I had a cheaper tester that looked like something out of the 60s. It would tell you about your power rails, but it required a book to understand. This thing is clear as a bell. As you can see in the pictures, you can clearly make out power levels for the 5V, 12V, 3.3V, 5VSB, and PG. The book for the tester also lists the appropriate ranges for a PSU, so you can quickly tell if your power supply is good or not. Worth every penny.

Bought this to replace my last tester I lost from Rosewill. This one seems to have more features and is easy to read. The extra money seems to be worth it for the ease of use.

Product works as expected; the quality in the design and performance is great, and it works with current technology.

Excelente producto, muy recomendado.

Purchased to troubleshoot a failing computer. It had a heavy duty PSU, and we could not definitely eliminate that. So, this took the power supply out of the failure equation and allowed us to move on. Good test equipment allows you to focus on the real problem, not continue guessing.

Good product

Worked great