Rexus PST-3 20/24pin Power Supply Tester


A Power Supply Tester Is Something Every Enthusiast Should Have

Rexus ATX Power Supply Tester

Today I thought that it would be interesting to review something that doesn’t get much attention, a power supply tester. This is one of those products that does not get sent out for review much, but is often used by those that work on computers for a living as it is a quick and simple diagnostic tool that can be easily used at the shop or on the road. Power supply testers have come a long way since 2005 and the days of having just a green or red LED light to tell you the status of the power supply are long gone. Let’s take a look to see what you get when you spend $20.99 on the Rexus PST-3 digital power supply tester.

Rexus ATX Power Supply Tester

The new models are now metal, which means that it is tougher to melt the housing and that the tester is a little more durable for those of you that like to be rough on things. The old plastic power supply testers like the Antec ATX12V Power Supply Tester would get so hot that after a few minutes the plastic housing would melt like the one pictured above. For those curious how this happened, I just plugged the Antec tester into a power supply and then the phone rang. To make a long story short I didn’t unplug it and a few minutes later I returned to find a melted, but still working device. The Rexus power supply tester is sleeker, better made and has LCD display to give you the actual reading of the voltages. For those curious about size it measures 150mm (l) x 64mm (w) x 18mm (t).

Rexus ATX Power Supply Tester

The Rexus power supply tester is compatible with both 20-pin and 24-pin power supplies, so no worries on that front. The power supply tester has the ability to the following connectors:

  • 20-pin and 24-pin power supplies
  • SATA power
  • Pentium 4 power connector
  • PCI-Express power connectors
  • Xeon power connectors
  • Floppy drive connectors
  • standard 4-pin molex power supply connectors
  • Accurate voltage indicator +/-V(+12V1/+5V/+3.3V/5VSB/+12V2/-12V)

As you can tell, power supply testers have come a long way since the last time one was reviewed here on the site in 2005.

Rexus ATX Power Supply Tester

On the bottom of the tester is the 4-pin molex connector (shown above) and at the top of the tester is the SATA connector (not shown). Now that the basic features of this simple to use power supply tester are known let’s take a look at how it works in real life.

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