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Rexus PST-3 Digital Power Supply Tester with LCD

Ships from United States. Most customers receive within 2-10 days.

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Rexus PST-3 Digital Power Supply Tester with LCD

A quick and easy solution for troubleshooting your PSU issues

The Rexus PST-3 power supply tester is a must-have for DIY enthusiasts or those working on computers for a living. It connects to the PSU's output connectors, measures the voltage, and displays the results on a backlit LCD screen - instead of having just LEDs indicating the status. It supports today's popular connectors, including 20+4-pin, 4+4-pin for CPU, 6-pin PCIe, 4-pin Molex, SATA and 4-pin fan power connectors. It also displays the Power Good (PG) value on the lower right hand corner. It is the delay in time between the DC rails stabilizing and the Power Good signal being issued for the system to boot, without this signal a system will be unable to boot. Plus, this gadget is compact, lightweight, and rugged built with metal housing, making the Rexus PST-3 power supply tester with LCD a durable and portable solution you can count on to troubleshoot power supply issues at home or in the field.

  • ATX PSU each output connectors check
  • Tests 20-pin and 24-pin power supplies
  • Tests SATA power
  • Tests Pentium 4 power connector
  • Tests PCI-Express power connectors
  • Tests Xeon power connectors
  • Tests Floppy drive connectors
  • Tests standard 4-pin power supply connectors
  • Accurate voltage indicator +/-V(+12V1/+5V/+3.3V/5VSB/+12V2/-12V)
  • ATX P.G value display.
  • Lower or higher P.G values alarm
  • Lower voltage detected alarm
  • Over voltage alarm
  • No voltage detected alarm

General information

General information

General information

How to use

  1. Plug-in 24pin and plug-in (P4 / P6 or P8) connector into the tester before turn on power.
    • 20pin ATX PSU: use P4 connector.
    • 24pin ATX PSU: use P6 connector.
    • EPS PSU: use P8 connector.
  2. Turn on your power supply
  3. LCD show each voltage and P.G value on the screen automatic and you can hear 2 beep sounds.
  4. ATX power output connector checking one by one.
    • If power output is working, the LED will light on
    • If power output failed, the LED will not light on.
  5. Plug-in (HDD/Floppy) connector and check LED light. (+12V1/+5V).
  6. Plug-in SATA connector and check LED light (+12V1/+5V/+3.3V).
  7. Remove the connector after your checking.
  8. DO NOT plug-in 2 connectors in to the tester at the same time. ( Only 24pin and (P4/P6/P8)
  9. Abnormal voltage detected will not display on the screen.
  10. No voltage detect, "LL" will display on the screen.
  11. Detected Voltage lower than Min. value, "LL" will display on the screen.
  12. Detected voltage higher than Max. value, "HH" will display on the screen.
  13. When detected voltage is lower than table value (A), will alarm.
  14. When detected voltage is higher than table value (B), will alarm.
  15. P.G value detected lower 100ms or higher 900ms, P>G value is abnormal and alarm.

When abnormal happened, it will alarm and relative readouts blink on the screen.

General information

Please Note:

Each voltage normal range:

  • Reference field Low (A) and High (B)
  • +/-5%: +5V, +5VSB, +3.3V
  • +/-10%: +12V1, +12V2, -12V

The -5V DC output is taken off from Intel ATX12V design guide since the 1.2 version.

  • The -5V usage was for last generation ISA slot. But the old ISA had been phased out since 1993~1994.
  • Neither P3 nor P4 systems will need -5V output.

Learn more about the Rexus PST-3

Warranty, Returns, And Additional Information
Ownership: 1 month to 1 year
Verified Owner
5/ 5
An excellent PSU tester, great price

Pros: A nice LCD that displays useful information about the PSU being tested.

Cons: None that I know about.

Other Thoughts: Whenever I dont test a PSU it comes back to bite me in the end. Now I test any new PSU for confidence. The next time I am debugging a flakey system I hope I remember to test the PSU first. If you are running a serious studio / workplace that uses computers that you are maintaining, you need this, or something like this, in your toolkit.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Rexus PST3-- King of the Hill

Pros: Easily-read display, not merely a black-and-silver LCD image, but black-against-bright blue for clarity.

1-- Precisely cut, solid connectors for all standard cables, never too tight or too loose

2-- Sturdy metal case, slim and pocket-size

3-- Safe working range violation-- beep alarm indicates when voltage falls below a safe/acceptable minimum or exceeds a safe/acceptable maximum specific to a connector (from -+5% to -+8%, depending on connector), which is a tremendous aid to identify an intermittently failing PSU circuit, but without need to stand over the unit tested, meter in hand, waiting for the event.

4-- Abnormal voltage detection-- display indicates when voltage falls below a connector-specific low minimum or exceeds a connector-specific high maximum, and flashes "LL" or "HH" on that abnormal voltage

5-- Display indicates "PowerGood" (PG) status in milliseconds, with alarm if the PG value falls below or exceeds the range of 100 to 900ms

Meter is ideal for routine checks of test and reserve/spare PSUs, to prevent damage before connecting valuable equipment and possibly damaging disk data. Without this meter, the only status indication is the wryly-labled "smoke test", which indicates possible equipment damage

Cons: None, with Possible confusion (to new users) on the difference between the alarm for violation of safe working range and a flashing indicator for abnormal voltage. To a new user, the two may seem the same, but

1-- the safe working range violation beep alarm occurs as a failing PSU value briefly enters a damaging range one or more times in a running, real-time test for random events

2-- the abnormal voltage display flashes after any single event, indicating definite damage/malfunction in the PSU

Other Thoughts: This product reviewed by "Definitely Ambivalent", a purchaser and satisfied user (after one week)

4 out of 4 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
It Works, and apparently the PSU does too.

Pros: Works as it should

Cons: None

Other Thoughts: Handy tool to have.

Did you find this review helpful?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Works as expected.

Pros: Good device.

Cons: No latch indicator on 20/24 pin connector.

Other Thoughts: The supplied printed instructions were O.K., but viewing the PST-3 YouTube videos made a big difference in understanding the various PST-3 connectors and the LCD display.

The 20/24 pin connector does not indicate which is the latch side. Can be confusing the first time inserting a 20-pin connector.

Accidentally bounced the PST-3 off a hard tile floor and it survived with no damage.

2 out of 2 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
4/ 5
Easy to use

Pros: Simple

Cons: Limited instructions, YouTube was helpful.

Did you find this review helpful?
5/ 5
Awesome!

Pros: Works VERY well! Glad I purchased this item.

Cons: None!

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Simple

Pros: Good readouts

Cons: n/a

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Rexus PST Digital Power Supply Tester

Pros: Works Very Well, Digital Readout ,Easy to Use. Excellent Price.

Cons: None

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