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Black rectangular ATX power supply tester with color display and multiple connectors

Thermaltake Dr. Power III Pro ATX Power Supply Tester

SKU CH-4A8D-PBEKC

Tests ATX power supplies up to version 3.1 with real-time voltage, continuity and power-good readings on a colour display

  • Fit typeAC-083-OO1NAN-A1
  • Key features1 in x 2.9 in, Thermaltake, AC-083-OO1NAN-A1, false, 3 Year
  • Overall height6 L x 4 W x 1.5 H inches
  • Overall width6 L x 4 W x 1.5 H inches
  • Overall length6 L x 4 W x 1.5 H inches
  • Product weight0.4 lb (0.18 kg)
  • Real-time voltage and PG readings for +12V, +5V, +3.3V, +5Vsb
  • Continuity checks with audible and visual fault alerts
  • PCIe 5.1 sense detects GPU power limits 150W 300W 450W 600W
  • Tests ATX12V v3.1 PSUs via 24pin 12V-2X6 EPS PCIe SATA Molex
  • Compact color display 1 x 2.9 inches weighs .4 pounds

ATX 3.1 Power Supply Tester

The Dr. Power III Pro is a dedicated diagnostic tool for checking desktop power supplies against the ATX 3.1 specification. It connects directly to the 24-pin main board connector, 12V-2X6, 4+4 EPS, 6+2 PCIe, SATA and Molex leads. Technicians and system builders use it to verify voltage output, continuity and power-good timing before installing a unit.

Bench Testing Without a Motherboard

The tester plugs into every major PSU cable, letting you validate a power supply on the bench without a full system build. Real-time readings for +12V, +5V, +3.3V and +5Vsb rails appear on the colour display alongside the PG signal measured in milliseconds. Audible beeps and a red screen flag any rail that falls outside limits, freeing you from guesswork during assembly or repair.

PCIe 5.1 GPU Power Detection

Sideband SENSE0 and SENSE1 signals are read so the tester reports the exact wattage a modern graphics card can draw — 150W, 300W, 450W or 600W. It covers ATX 3.1 compliant units up to the 12V-2X6 connector standard. The tool does not load the supply, so it cannot confirm stability under heavy current or detect ripple that only appears at full load.

How it compares

Measured against everything we stock in Batteries, Cords & Power Parts, at today’s prices. Recalculated every night.

Price $69.99
Pricier than about 80% of the 100 comparable items (median $17.99).

Specifications

Product
Brand nameThermaltake
Size & build
Overall height6 L x 4 W x 1.5 H inches
Overall width6 L x 4 W x 1.5 H inches
Overall length6 L x 4 W x 1.5 H inches
Product weight0.4 lb (0.18 kg)
Compatibility
Fit typeAC-083-OO1NAN-A1

Questions about this item

How long does the PG signal measurement take to stabilise under sustained load?

The tester measures the PG signal in milliseconds for each rail, giving an instant reading rather than a timed stabilisation value.

Does the audible alert stay on continuously during an all-day test session?

The alert beeps once when a fault is detected and the display turns red; it does not sound continuously while the tester remains connected.

Which power-supply connectors must already be present on the unit under test for the 12V-2X6 check to work?

The power supply needs a 12V-2X6 (12VHPWR) output; the tester also accepts 24-pin, 4+4 EPS, 6+2 PCIe, SATA and Molex connectors for other checks.

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