10 Best Pc Power Supply Tester of 2025

Tested and Reviewed: Top 10 Pc Power Supply Tester deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Fuhengli

Computer PC Power Supply Tester, ATX/ITX/IDE/HDD/SATA/BYI Connectors Power Supply Tester, 1.8'' LCD Screen (Aluminum Alloy Enclosure)

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Editor's bottom line:

“This pc power supply tester is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

[8-in-1 ATX Power Supply Tester] -- Support test 20-pin ATX / 24-pin ATX / HDD (IDE) / Floppy 4-pin / PCI-e 6-pin / 4-pin / EPS 8-pin (NOTE: can not fit for PCI-e 8-pin) / SATA connectors
[Aluminum Alloy Enclosure] -- Light and Easy to Carry, High Strength, Nice Thermal Conductivity & Corrosion Resistance
[1.8'' LCD Screen] -- Outputted Voltages shows on the 1.8'' LCD Screen, Easy to Read ( The 1.8'' LCD Screen was Powered by 20-pin / 24-pin Connector ), Note: The Product Screen Has a Load of Scratches All Over ItBecause The Screen is Easy to Scratch, We Put a Protective Film on It, If You Think It's Not Beautiful, You Can Tear It Off by Yourself
[Beep Alarm] -- When your power supply test value is beyond normal range, the Power Supply Tester would issue a buzzer alarm, Easy to Know
NOTE: The voltage of 20pin / 24pin connectors is displayed by the LCD Screen, as "+3.3V", "+12V1", "+5V", "-12V", "5VSB", "PG" (except "+12V2" on LCD Screen); The voltage of PCI-e 6P / 4P / EPS P8 connectors is displayed by the LCD Screen as "+12V2"
NOTE: The voltage of IDE (HDD), Floppy, SATA connector is displayed by the lights on the left of the power tester, IDE (HDD) connector is displayed by "+12V" & "+5V" lights; Floppy connector is displayed by "+12V" & "+5V" lights; SATA connector is displayed by "+12V", "+3.3V" & "+5V" lights
NOTE: When you test the SATA connector, please confirm how many wires your connector is. When the 5-wire SATA connector is normal, the tester will light up three LED lights "+12v", "5V" and "+3.3v". When the 4-wire SATA connector is normal, the tester will only light up two LED lights "+12v" and "+5v"

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Picked by 397 people today

9.5

Thermaltake

Thermaltake Dr. Power III ATX Power Supply Tester/Support up to ATX12V v3.1 with PCIe 12+4pin Connector/Voltage Output for +12V, +5V, +3.3V, and +5Vsb, AC-069-OO1NAN-A1

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Main Highlights

Universal ATX Power Supply Tester Supports Up To ATX12V v3.1.
Real-Time Voltage LCD Display
Precision in PCIe 12+4pin Connector Detection
Precision in PCIe 12+4pin Connector Detection
Built-In Diagnostic System for Proactive Maintenance

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9.5

Comidox

Comidox 1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm

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Main Highlights

The LCD power tester is a powerful power test device. This power tester only needs to be connected to the ATX connector of the power supply to easily and intuitively know whether the output of each power supply is normal. It can detect ATX, BTX, ITX, TFX computer power supply, and can display various voltage and PG values in liquid crystal to quickly detect the performance of computer power supply.
The LCD displays various parameters such as output voltage and PG. When each parameter exceeds the normal value, the buzzer will sound a warning and the corresponding value will flash.
It can measure the voltage of each group of power supply 3.3V/+5V/+12V/-12V/SB+5V/PG, and also measure the output wire P4/P6/P8/SATA/IDE, external DIE/SATA/P6/P8 is the light Displayed, there is no LCD voltage. Only the 24pin or 20pin will have the LCD voltage.
It has LCD intuitive and accurate display voltage (+/-0.01V), automatic fault alarm, complete test interface, small and beautiful appearance, and many test functions. It is the best choice for quickly detecting PC power.
Support 20Pin, 24Pin ATX interface / SATA interface / 4Pin, 8Pin interface / PCI-E graphics card 6Pin interface / floppy drive interface / ATE hard disk interface.

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9.2

Kingwin

Kingwin Digital Power Supply Tester with LCD Screen – Compatible with ATX, ITX, IDE, HDD, SATA, and BTX, Easy-to-Use Diagnostic Tool for PC Power Supply Testing (Aluminum)

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Main Highlights

Comprehensive Power Supply Testing: Efficiently test a wide range of power supply units (PSUs) including ATX, ITX, IDE, HDD, SATA, and BTX, ensuring your components are functioning correctly.
Digital LCD Display: The clear LCD screen provides real-time readouts of voltage levels, allowing you to easily monitor and diagnose potential issues with your power supply.
User-Friendly Interface: Designed for both beginners and professionals, this power supply tester is easy to use, with simple plug-and-play functionality that requires no advanced technical knowledge.
Accurate Voltage Readouts: Get precise measurements of various voltage rails including +12V, +5V, +3.3V, and more, ensuring your power supply is delivering the correct voltage to your PC components.
Portable and Compact Design: Lightweight and compact, this tester is easy to carry and store, making it an essential tool for system builders, repair technicians, and PC enthusiasts.
Multi-Connector Compatibility: Equipped with multiple connectors, this tester supports a wide range of power supply types, ensuring versatility and convenience for various testing needs.
Quick Diagnostic Results: Save time with fast, reliable testing results that help you quickly identify faulty power supplies, preventing potential damage to your computer components.
Quick Diagnostic Results: Save time with fast, reliable testing results that help you quickly identify faulty power supplies, preventing potential damage to your computer components.
Safety Features: Built-in safeguards protect against short circuits, overvoltage, and other potential hazards, ensuring a safe testing environment for both the user and the equipment.
Durable Construction: Made with high-quality aluminum materials, this power supply tester is designed for long-term use, offering reliable performance even with frequent testing.

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9.0

ASHATA

Computer PC Power Supply Tester with LCD Display, ATX Power Supply Computer Host Inspection Maintenance Tester Tool, PC Power Supply Tester Detect ATX,BTX,ITX,TFX Computer Power Supplies

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Main Highlights

INTELLIGENT LCD PARAMETER DISPLAY: The ATX power supply test and repair tool is equipped with a smart LCD screen that displays key parameters such as +12V, -12V, +5V, -5V, +3.3V, and SB and PG signals in real-time and intuitively, providing users with comprehensive and clear power supply status information.
REAL-TIME FAULT INTELLIGENT ALARM: With a built-in intelligent monitoring system, the power supply tester immediately triggers a buzzer to emit a warning sound and flashes the abnormal parameters on the LCD screen when voltage parameters are detected outside the normal range. This ensures that users can quickly detect and deal with power supply issues to prevent potential hardware damage.
COMPREHENSIVE TESTING SUPPORT FOR MULTIPLE INTERFACES: The power supply tester supporting a variety of power supply interfaces including 20Pin, 24Pin ATX, SATA, 4Pin, 8Pin connectors, PCI-E graphics card 6Pin connectors, as well as floppy drive and multiple power supply interfaces, it covers the mainstream power supply interface types on the market, ensuring users can test power supplies of various models.
PRECISE VOLTAGE MEASUREMENT CAPABILITY: The power supply tester can measure voltage with a high precision of 0.01V, helping users accurately determine whether the power supply output is stable and if there are issues with voltage being too high or too low, providing protection for the stability of the power supply and the safety of computer hardware.
PORTABILITY AND EASE OF USE: Designed to be lightweight and portable with an intuitive operation, it allows for quick power supply testing without the need for professional skills, making it ideal for computer repair personnel and everyday users. Whether for detecting power supply faults or routine maintenance, it greatly enhances efficiency and convenience.

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8.8

axGear

axGear Power Supply Tester PC Computer LCD 20/24 Pin 4 PSU ATX BTX ITX SATA HDD Digital

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Main Highlights

The power supply tester is a robust voltage tester for PC-power supplies
ATX . BTX, and ITX compliant power supplies can be tested
LCD display indicate the status of voltage
The PC / SPS is suitable for the ambitious hobbies, as well as for a quick functional check in a specialized trade
Test the power supply and avoid damage to computer equipment; no batteries needed

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8.6

BUBUCAM

PC Power Supply Diagnostic LCD Computer Testing Device Computer 20/24 4/6/8 Pin Supply Tester for SATA, IDE, HDD, ATX, ITX, Byi Plug

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Main Highlights

It has the characteristics of intuitive and accurate voltage (+/-0.01V) LCD display, automatic error alarm, complete test interface, compact and beautiful appearance and multiple test functions, which is a fast detection of PC power supply. It's your most reliable helper.
The power tester can easily and intuitively detect whether the output of each circuit of the power supply is normal by connecting the ATX connector of the power supply.
Power Star Power Tester is a powerful power tester that can detect ATX, BTX, ITX, TFX computer power supply and can display the voltage and PG value of each group on LCD to quickly detect the computer power supply and facilitate the instrument.
Any voltage or PG problem alerts and displays the voltage value, which solves the problem that a group of first generation low voltage testers cannot be tested! It is very convenient and is a rare recognition tool for power sales personnel and companies!
Features: LCD displays output voltage, PG and other parameters. If the parameters exceed the normal value, the buzzer gives a warning signal and the corresponding value flashes.
The LCD power tester is a powerful power tester. The power tester can easily and intuitively detect whether the output of each circuit is normal by connecting the ATX connector of the power supply. It can detect ATX, BTX, ITX, TFX computer power supply and display each group of voltage and PG value on LCD to quickly detect the performance of computer power supply.

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8.3

Optimal Shop

Optimal Shop 20+4 Pin LCD Computer Power Supply Tester for SATA IDE HDD ATX ITX BYI Connectors-Black

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Main Highlights

8-in-1 ATX power supply tester: Support testing 20-pin IDE/24-pin IDE/HDD/floppy disk 4-pin/PCI-e 6-pin/4-pin/8-pin/SATA connector.
Aluminum alloy shell: light and easy to carry, high strength, good thermal conductivity and corrosion resistance.
1.8" LCD screen: The output voltage is displayed on the 1.8" LCD screen, which is easy to read (1.8" LCD screen is powered by the 20-pin/24-pin connector). Note: Is there a scratch on the product screen? Because the screen is easy to scratch, we put a protective film on it, if you think it is not beautiful, you can tear it off by yourself.
Buzzer alarm: When your power supply PG number fails, the power tester will emit a buzzer alarm, which is easy to know.
When testing with HDD/floppy disk 4-pin/PCI-e 6-pin/4-pin/8-pin/SATA connector, the indicator on the left shows the output voltage (+12V + 3.3V + 5V).

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8.1

ASHATA

20/24 4/6/8 Pin Computer PC Power Supply Tester with LCD Display and Buzzer for ATX, ITX, BTX, PCI E, SATA, HDD

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Main Highlights

AUTOMATICALLY ALARM: When your power supply test value is normal range, the Power Supply Tester would issue a buzzer alarm, Easy to Know.
WITH LED DISPLAY: We have developed a portable computer power tester for the power supply market that can judge the quality of the power supply. It has LCD display intuitive and accurate display voltage (+/ 0.01V), automatic fault alarm, complete test interface, small and beautiful appearance, and more test functions. It is your best choice and helper to quickly detect PC power.
EASY TO USE: This power tester only needs to be connected to the power supply ATX connector to easily and intuitively know whether the output of each power supply is normal. It can detect ATX, BTX, ITX, TFX computer power supply, and can display various voltage and PG values in LCD screen to quickly detect the performance of computer power supply.
PRACTICAL & CONVENIENCE: Small and practical power tester. Now the number of power output groups is increasing. As long as one of them has problem, the hardware of the computer system may work abnormally or even burn out. To measure whether the output voltage output of the power supply is stable, the player usually uses a multimeter. But for the average user is still a little troublesome.
NOTE: It can also measure the output wire P4/P6/P8/SATA/IDE, and the external DIE/SATA/P6/P8 is the light display, there is no LCD voltage. There is LCD voltage display only when connecting to the 24pin or 20pin.

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8.1

VBESTLIFE

ATX Power Supply Tester, 20/24 4/6/8 Pin Computer Host Inspection and Maintenance Tester Tool, with Buzzer and LCD Display, for ATX, ITX, BTX, PCI E, SATA, HDD

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Main Highlights

LCD DISPLAY: LCD liquid crystal display, the output voltage is clear at a . If there is any defect, the buzzer will automatically alarm.
VOLTAGE DISPLAY: It can also measure the output wire P4/P6/P8/SATA/IDE, and the external DIE/SATA/P6/P8 is the light display, there is no LCD voltage. There is LCD voltage display only when connecting to the 24pin or 20pin.
MINI and PRACTICAL: Now the number of power output groups is increasing. As long as one of them has problem, the hardware of the computer system may work abnormally or even burn out. To measure whether the output voltage output of the power supply is stable, the player usually uses a multimeter. But for the average user is still a little troublesome.
ATX POWER SUPPLY TESTER: We have developed a portable computer power tester for the power supply market that cannot judge the quality of the power supply. It has LCD intuitive and accurate display voltage (+/-0.01V), automatic fault alarm, complete test interface, small and beautiful appearance, and more test functions. It is your best choice and helper to quickly detect PC power.
WIDE APPLICATION: ATX Power Tester is a powerful power test device that can detect ATX, BTX, ITX, TFX computer power supplies, and can display various groups of voltage and PG values in the LCD screen, and quickly detect computer power supply to facilitate the instrument.

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Our Best Overall Choice

Best Choice

9.7

Fuhengli

Computer PC Power Supply Tester, ATX/ITX/IDE/HDD/SATA/BYI Connectors Power Supply Tester, 1.8'' LCD Screen (Aluminum Alloy Enclosure)

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

[8-in-1 ATX Power Supply Tester] -- Support test 20-pin ATX / 24-pin ATX / HDD (IDE) / Floppy 4-pin / PCI-e 6-pin / 4-pin / EPS 8-pin (NOTE: can not fit for PCI-e 8-pin) / SATA connectors
[Aluminum Alloy Enclosure] -- Light and Easy to Carry, High Strength, Nice Thermal Conductivity & Corrosion Resistance
[1.8'' LCD Screen] -- Outputted Voltages shows on the 1.8'' LCD Screen, Easy to Read ( The 1.8'' LCD Screen was Powered by 20-pin / 24-pin Connector ), Note: The Product Screen Has a Load of Scratches All Over ItBecause The Screen is Easy to Scratch, We Put a Protective Film on It, If You Think It's Not Beautiful, You Can Tear It Off by Yourself
[Beep Alarm] -- When your power supply test value is beyond normal range, the Power Supply Tester would issue a buzzer alarm, Easy to Know
NOTE: The voltage of 20pin / 24pin connectors is displayed by the LCD Screen, as "+3.3V", "+12V1", "+5V", "-12V", "5VSB", "PG" (except "+12V2" on LCD Screen); The voltage of PCI-e 6P / 4P / EPS P8 connectors is displayed by the LCD Screen as "+12V2"
NOTE: The voltage of IDE (HDD), Floppy, SATA connector is displayed by the lights on the left of the power tester, IDE (HDD) connector is displayed by "+12V" & "+5V" lights; Floppy connector is displayed by "+12V" & "+5V" lights; SATA connector is displayed by "+12V", "+3.3V" & "+5V" lights
NOTE: When you test the SATA connector, please confirm how many wires your connector is. When the 5-wire SATA connector is normal, the tester will light up three LED lights "+12v", "5V" and "+3.3v". When the 4-wire SATA connector is normal, the tester will only light up two LED lights "+12v" and "+5v"

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