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Black rectangular ATX power supply tester with LED indicators and multiple connector sockets

myVolts

myVolts ATX Power Supply Tester Black

SKU CH-E50Q-50T80

Tests ATX power supplies by connecting 20 or 24-pin, HDD and P4 connectors, with LED indicators for 3.3V, 5V, 12V and other rails

  • TypeAT
  • Quickly diagnose power issues by plugging the tester into the 24-pin ATX connector
  • LED indicators light up for each voltage rail including +3.3 V and +12 V
  • Checks 20-pin and 24-pin ATX plus HDD and P4 power connectors
  • Durable ABS construction built for repeated bench use
  • Simple plug-and-play operation with no software or batteries required

ATX Power Supply Tester

The myVolts ATX Power Supply Tester is a compact diagnostic tool that plugs directly into a power supply's main and peripheral connectors to verify voltage output. It is built for system builders, repair technicians and hobbyists who need a quick pass-fail check before installing or returning a PSU. The black ABS housing contains LED indicators for each monitored rail. No software or external power is required.

Compatibility Check

Before ordering, confirm that the power supply under test uses a standard 20-pin or 24-pin ATX main connector and provides the usual 4-pin, 6-pin or 8-pin CPU auxiliary connectors. The tester also accepts a traditional 4-pin HDD-style peripheral connector for +5 V and +12 V verification. Ensure the PSU can be powered on independently, either via a case switch or a paper-clip jumper on the green and black wires of the main connector.

Build and Connectors

The unit is moulded from black ABS plastic with clearly labelled LED windows for +3.3 V, -12 V, PG, +5 VSB, +12 V, -5 V and +5 V on the main rail, plus +12 V and +5 V for the HDD connector and a dedicated +12 V LED for the CPU connector. Each keyed socket matches the corresponding PSU plug orientation, so connections are foolproof and the LEDs light instantly to show which rails are live. The lightweight tester is small enough to keep in a tool bag for on-site troubleshooting.

Highlights

  • Quickly diagnose power issues by plugging the tester into the 24-pin ATX connector
  • LED indicators light up for each voltage rail including +3.3 V and +12 V
  • Checks 20-pin and 24-pin ATX plus HDD and P4 power connectors
  • Durable ABS construction built for repeated bench use
  • Simple plug-and-play operation with no software or batteries required

Specifications

TypeAT

Questions about this item

Does the tester ship with any extra cables or only the built-in ATX, HDD and P4 sockets?

The unit provides a 24-pin socket that also accepts 20-pin plugs, an HDD power socket and a P4/P6/P8 socket; no separate cables are included.

Which LED indicators should I watch to confirm every rail on a standard ATX supply?

Seven right-hand LEDs show +3.3 V, -12 V, PG, +5 VSB, +12 V, -5 V and +5 V; two left-hand LEDs show +12 V and +5 V for peripheral connectors; a single left LED shows +12 V for the P4/P6/P8 connector.

What does the PG light actually tell me once the tester is plugged into a live power supply?

The PG LED confirms the power-good signal is asserted, meaning the supply has stabilised its output voltages and is safe for the motherboard to start.

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