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Compact black ATX power supply tester with 20/24-pin and multiple connector ports

Rexus

Rexus PST-2 20/24-pin ATX Power Supply Tester

SKU CH-CWYA-E4CA4 MPN PST-2

Tests 20-pin and 24-pin ATX, SATA, PCI-Express, Xeon, Pentium 4 and floppy connectors while verifying +3.3V, +5V, +12V, -12V, +5VSB and PG signals

  • SpecificationsTest for: Tests 20-pin and 24-pin power supplies Tests SATA
  • FeaturesThis product is a simple tester for switching power supply.
  • Tests 20-pin and 24-pin ATX power supplies for quick voltage verification
  • Checks SATA power connectors to confirm drive rail integrity
  • Validates Pentium 4 and Xeon auxiliary connectors for CPU power delivery
  • Measures PCI-Express power outputs to ensure graphics card stability
  • Monitors +3.3V, +5V, +12V, -12V, +5VSB and PG signals for comprehensive diagnostics

8-in-1 ATX Power Supply Tester

The Rexus PST-2 is a compact diagnostic tool for checking desktop power supplies. It connects directly to 20-pin and 24-pin ATX headers plus auxiliary connectors to verify rail voltages. Technicians and system builders use it to confirm a unit is functional before installation.

Tests 20-pin and 24-pin ATX connectors

The single specification that determines suitability is the range of connectors supported. This tester covers 20-pin and 24-pin ATX, SATA, Pentium 4, PCI-Express, Xeon, floppy and standard 4-pin power plugs. It reads +3.3V, +5V, +12V, -12V, +5VSB and PG signals.

Voltage verification for legacy and current rails

The device comfortably handles ATX supplies that still provide the -5V rail removed from the design guide after version 1.2 in 1993-1994. It does not apply a load, so it cannot reveal voltage drop under real-world current draw. Builders needing loaded stress tests require separate equipment.

Highlights

  • Tests 20-pin and 24-pin ATX power supplies for quick voltage verification
  • Checks SATA power connectors to confirm drive rail integrity
  • Validates Pentium 4 and Xeon auxiliary connectors for CPU power delivery
  • Measures PCI-Express power outputs to ensure graphics card stability
  • Monitors +3.3V, +5V, +12V, -12V, +5VSB and PG signals for comprehensive diagnostics

Specifications

BrandRexus
ModelPST-2
SpecificationsTest for:
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
Tests for +3.3V, -12V, PG, +5VSB, +12V, -5V, +5V outputs
Note:
The -5V DC output is took off from Intel ATX12V design guide since the 1.2 version.
1. The -5V usage was for last generation ISA slot. But the old ISA had been phased out since 1993~1994.
2. Neither P3 nor P4 systems will need -5V output.
FeaturesThis product is a simple tester for switching power supply. It makes it easy to test the power supply output.
1. Turn-on your power supply.
2. Plug-in your 24 pin power supply connector to mini tester
3. Check LED light it ON or OFF
(+5V. +12V. +3.3V. -5V. -12V. +5VBS. PG)
- If the power output is working, the LED will light and you will hear a sound
- If the power output fails, you won't see the LED light & no sound
4. Plug the HDD con, check +12V, +5V
5. Remove HDD, Plug p4(p6/p8)con, check +12V
6. Remove p4(p6/p8)con, plug FLOPPY con, check +12V, +5V
7. Remove Floppy con, plug SAT
Shipping weight0.09 kg
Package size114 × 79 × 25 mm

Questions about this item

What does the tester show for the +12V and +3.3V rails when a power supply is connected?

The unit lights LEDs for +12V, +3.3V, +5V, +5VSB, -12V and PG so you can see at a glance whether each rail is present.

Which connectors does the tester accept for ATX, PCI-Express and SATA power?

It has sockets for 20-pin and 24-pin ATX, 4-pin and 8-pin CPU, 6-pin and 8-pin PCI-Express, SATA, floppy and standard 4-pin peripheral plugs.

How much clearance does the tester need around a 24-pin connector to fit in a case?

The tester body is a compact handheld module that plugs directly onto the 24-pin header; only the depth of the connector itself is required.

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