Looking Beyond the Yankok Digital PSU Tester Backlit? 6 Alternatives Worth a Look

How these alternatives compare

Optimal Shop 20+4 Pin LCD Power Supply Tester

The Optimal Shop 20+4 Pin tester prioritizes portability with a slim profile measuring 3.7 by 8.3 inches and weighing just 3.2 ounces. It shares the ATX form factor and LCD display of the Yankok model but offers a more compact physical footprint for technicians who carry tools frequently. You get dedicated support for 20+4 pin connectors, ensuring compatibility with modern power supplies. While it lacks the specific audible alarm feature mentioned for the Yankok, its durable build and clear digital readouts make it a strong choice for professionals who value size and broad connector support over screen dimensions or sound alerts.

Optimal Shop LCD ATX Power Supply Tester

This Optimal Shop variant is a compact, durable option designed for verifying multiple voltage rails across various connectors. Like the Yankok, it supports ATX form factors and uses an LCD display for clear readings. The primary difference lies in its focus on build quality and precise digital output. It is ideal for users who prioritize robust construction and reliable data over large screen sizes. It does not explicitly list an audible alarm in its specs, so you rely on visual checks. This model suits technicians who need a straightforward, high-quality tool for quick voltage verification without complex setup procedures or additional features.

Comidox 20/24 Pin LCD Power Supply Tester

The Comidox tester is a compact tool designed for quick ATX, BTX, ITX, and TFX voltage checks. It features an LCD display similar to the Yankok but includes an alarm system for visual verification of faults. Its dimensions of 4.95 by 2.51 inches make it slightly larger than some ultra-compact options but still easy to handle. It supports main connector voltages and peripheral checks. If you need a budget-friendly option that still provides alarm feedback for voltage failures, this is a practical choice. It gives up the specific backlit emphasis of the Yankok but delivers essential functionality for standard power supply testing.

ASHATA ATX LCD Power Supply Tester

The ASHATA ATX PSU Tester provides precise voltage monitoring for multiple connectors, including peripheral power supplies. It shares the ATX form factor and LCD display with the Yankok model but emphasizes real-time fault alarms and detailed rail data. Weighing 2.82 ounces, it is lightweight and portable. This tester is suitable for users who need to check stability across various connectors without complex tools. It differs from the Yankok by focusing on detailed rail data and immediate alarm feedback. If you require thorough verification of multiple voltage rails and clear fault indications, this option offers a practical alternative for quick and accurate PSU checks.

ASHATA LCD Power Supply Tester

This ASHATA model offers clear voltage readings and an alarm for quick PSU checks, supporting ATX and ITX units. It shares the LCD display and ATX form factor with the Yankok tester. Weighing 2.82 ounces, it is designed for portability and ease of use. It fits users who need to verify power output stability without complex setups. The key difference is its focus on straightforward verification with audible or visual alarms for faults. It does not explicitly mention backlit screens or BTX support in its summary, so it is best for those who need basic, reliable testing for standard ATX and ITX power supplies without extra features.

JacobsParts 20/24-Pin LCD Power Supply Tester

The JacobsParts 20+4 Pin LCD PSU Tester offers basic voltage checks for standard ATX systems. It shares the ATX form factor and LCD display with the Yankok model but focuses on simplicity. Weighing 3.53 ounces, it is a straightforward tool for core rail verification. It does not explicitly mention an audible alarm or backlit screen, so you rely on visual LCD readings. This option is ideal for users who need a simple, battery-free tool for quick checks. It gives up advanced features like multi-connector support or alarms but provides a reliable, no-frills solution for verifying standard ATX power supply voltages.

Quick picks

Our 7 picks

1 Best overall

Yankok Digital PSU Tester with Backlit LCD

Best for: Quick ATX, ITX, and BTX PSU checks

Form Factor

ATX

Display Type

LCD Display

View on Amazon: Yankok Digital PSU Tester with Backlit LCD Affiliate link

The Yankok YKNT-PST-ATX04 checks ATX, ITX, and BTX power supplies. It uses a 20/24-pin connector to power itself, so you do not need batteries. The backlit LCD screen shows +5 VSB, +12V, +3.3V, and +5V outputs. An audible alarm warns you of voltage failures. This tool helps you verify if a power supply works before installing it in your computer.

Pros

• Tests ATX, ITX, and BTX power supplies
• Backlit LCD display shows key voltages
• Audible alarm for voltage failures
• Self-powered via 20/24-pin connector

Cons

• Limited to standard ATX voltage checks
• No remote control or app support
• Plastic build may feel less durable

Good fit if

• You need to verify PSU voltages quickly
• You work with ATX, ITX, or BTX units
• You want a self-powered testing tool

Skip if

• You require advanced diagnostic features
• You need to test non-standard PSU types
• You prefer a metal build over plastic

Verdict: Yankok Digital ATX PSU Tester is a practical tool for verifying standard power supply voltages. It fits users who need a quick, self-powered check for ATX, ITX, or BTX units without complex setup.

2 Best premium

Optimal Shop 20+4 Pin LCD Power Supply Tester

Best for: Technicians needing multi-connector ATX testing

Form Factor

ATX

Display Type

LCD Display

Dimensions

8.3 × 3.7 × 0.8 inches

Weight

3.2 ounces

View on Amazon: Optimal Shop 20+4 Pin LCD Power Supply Tester Affiliate link

This Optimal Shop tester covers 20+4 pin ATX and various peripheral connectors. It features a 1.8-inch LCD screen and a buzzer alarm for PG signal failures. The aluminum alloy shell is lightweight at 3.2 ounces. It displays voltage outputs for SATA, IDE, and PCIe connections. This tool suits technicians who need a compact, durable solution for verifying power supply stability across multiple connector types.

Pros

• Supports 20-pin, 24-pin, SATA, IDE, floppy, and PCIe connectors
• 1.8-inch LCD screen displays output voltage clearly
• Aluminum alloy shell provides corrosion resistance and thermal conductivity
• Built-in buzzer alarm signals PG number failures

Cons

• Small 1.8-inch screen may be harder to read than larger displays
• Protective film on screen requires removal before use
• No mention of included test cables or probes

Good fit if

• You need a single tool for ATX and peripheral testing
• You prefer a lightweight aluminum build for portability
• You want visual voltage confirmation alongside audio alarms

Skip if

• You require a large, high-resolution display for detailed readings
• You only test standard 24-pin ATX connectors
• You need a device with included SATA power cables

Verdict: Optimal Shop 20+4 Pin LCD PSU Tester is a compact, multi-connector verification tool for technicians who value portability and broad connector support over screen size.

3 Also great

Optimal Shop LCD ATX Power Supply Tester

Best for: portable multi-connector power supply verification

Form Factor

ATX

Display Type

LCD Display

View on Amazon: Optimal Shop LCD ATX Power Supply Tester Affiliate link

The Optimal Shop tester checks ATX power supplies using a 20+4 pin connector. It features a 1.8-inch LCD screen to display output voltages and a buzzer alarm for PG signal failures. The aluminum alloy shell provides a lightweight, corrosion-resistant build. You can test SATA, IDE, and PCIe connectors. This unit suits users who need a portable, durable tool for verifying multiple power supply rails.

Pros

• Supports 8-in-1 testing for ATX, ITX, and various connectors
• 1.8-inch LCD screen displays output voltage clearly
• Aluminum alloy shell offers high strength and thermal conductivity
• Built-in buzzer alarm indicates PG number failures

Cons

• Screen is prone to scratching and requires a protective film
• Only includes one unit per purchase
• Limited to standard ATX form factor testing

Good fit if

• You need to test multiple connector types like SATA and PCIe
• You prefer a lightweight, durable aluminum build
• You want clear voltage readings on an LCD screen

Skip if

• You require a larger display for easier reading
• You need to test non-standard or proprietary connectors
• You prefer a plastic housing for lower cost

Verdict: Optimal Shop 20+4 Pin LCD PSU Tester is a compact, durable option for technicians who need to verify multiple voltage rails across various connectors. It fits users who prioritize build quality and clear digital readouts over screen size.

4 Best budget

Comidox 20/24 Pin LCD Power Supply Tester

Best for: quick ATX form factor voltage checks

Form Factor

ATX

Device Compatibility

PCs

Display Type

LCD Display

View on Amazon: Comidox 20/24 Pin LCD Power Supply Tester Affiliate link

This Comidox unit is a dedicated tester for ATX, BTX, ITX, and TFX power supplies. It connects directly to the 20-pin or 24-pin main connector to read voltages and PG signals. The LCD screen shows precise values with +/-0.01V accuracy. It includes a buzzer that sounds and flashes values when parameters exceed normal limits. It also checks SATA, IDE, and PCIe connector lights. It fits users who need a compact, visual diagnostic tool for various form factors.

Pros

• LCD screen displays voltage and PG values
• Measures 3.3V, +5V, +12V, -12V, and SB+5V
• Buzzer alarms and flashes values on faults
• Checks SATA, IDE, and PCIe connector lights
• Supports ATX, BTX, ITX, and TFX formats

Cons

• Only displays voltage on the 20-pin or 24-pin main connector
• No voltage readout for external SATA or PCIe cables
• Limited to basic voltage and PG testing

Good fit if

• You need to test multiple ATX form factors
• You want visual voltage confirmation on the main connector
• You prefer audible alarms for fault detection

Skip if

• You need voltage readings for individual SATA cables
• You require a tester with a larger display
• You want to test power supplies without a main connector

Verdict: Comidox 20/24 Pin LCD PC Power Supply Tester is a compact tool for checking main connector voltages and alarms. It suits technicians who need quick, visual verification of ATX, BTX, ITX, or TFX power supplies without complex setup.

5 Also great

ASHATA ATX LCD Power Supply Tester

Best for: checking multiple voltage rails and connectors

Form Factor

ATX

Device Compatibility

PCs

Display Type

LCD Display

Dimensions

3.94 × 1.97 × 0.79 inches

Weight

2.82 ounces

View on Amazon: ASHATA ATX LCD Power Supply Tester Affiliate link

The ASHATA PSU tester checks ATX power supplies via 20/24-pin ATX, SATA, 4/8-pin, and 6-pin PCI-E connectors. Its LCD screen shows real-time voltages for +12V, -12V, +5V, -5V, +3.3V, SB, and PG signals. It measures voltage to 0.01V and sounds an alarm if values are out of range. This lightweight tool suits users who need precise, portable testing for various interfaces.

Pros

• LCD displays +12V, -12V, +5V, -5V, +3.3V, SB, and PG signals
• Measures voltage with 0.01V precision
• Supports 20/24-pin ATX, SATA, 4/8-pin, and 6-pin PCI-E
• Triggers buzzer alarm for abnormal voltages

Cons

• No mention of floppy drive support despite feature list claims
• Does not specify testing for 20+4 pin modular connectors
• Lacks data on display backlight brightness for dark environments

Good fit if

• You need to check multiple voltage rails simultaneously
• You require 0.01V precision for stable output verification
• You test various ATX, SATA, and PCI-E interfaces

Skip if

• You only test 20-pin legacy supplies without modern connectors
• You prefer digital readouts over LCD screens
• You need automatic fault logging capabilities

Verdict: ASHATA ATX PSU Tester with LCD provides precise voltage monitoring for multiple connectors. It fits users who need real-time fault alarms and detailed rail data for ATX and peripheral power supplies.

6 Also great

ASHATA LCD Power Supply Tester

Best for: Quick ATX/ITX PSU voltage verification

Form Factor

ATX

Device Compatibility

PCs

Display Type

LCD Display

Dimensions

3.94 × 1.97 × 0.79 inches

Weight

2.82 ounces

View on Amazon: ASHATA LCD Power Supply Tester Affiliate link

This ASHATA tester checks ATX, ITX, and BTX power supplies via the main 20- or 24-pin connector. Its LCD screen shows voltage readings with 0.01V accuracy and triggers an automatic buzzer alarm if values fall outside the normal range. The unit measures 3.94 by 1.97 by 0.79 inches and weighs 2.82 ounces. It suits users who want a quick, visual check of PSU health without using a multimeter.

Pros

• LCD display shows voltage with 0.01V accuracy
• Automatic buzzer alarm for abnormal readings
• Compatible with ATX, ITX, BTX, and TFX form factors
• Compact size at 3.94 by 1.97 by 0.79 inches

Cons

• SATA and P4/P6/P8 connectors only show LED lights, not voltage values
• No LCD voltage display when using external adapter cables
• Limited to testing PSU outputs, not system stability

Good fit if

• You want to quickly verify if a power supply is delivering correct voltages
• You prefer visual LCD feedback over listening to beeps alone
• You test various ATX, ITX, or BTX units regularly

Skip if

• You need precise voltage readings for SATA or peripheral cables
• You require a tester that supports modular PSU cables with full data
• You want a device that tests system boot capability rather than just PSU output

Verdict: ASHATA ATX Power Supply Tester with LCD offers clear voltage readings and an alarm for quick PSU checks. It fits builders who need to verify power output stability without complex tools.

7

JacobsParts 20/24-Pin LCD Power Supply Tester

Best for: Basic ATX voltage verification

Form Factor

ATX

Display Type

LCD Display

Weight

3.53 ounces

View on Amazon: JacobsParts 20/24-Pin LCD Power Supply Tester Affiliate link

This JacobsParts tester checks ATX, ITX, and BTX power supplies via a 20+4 pin connector. It displays +3.3V, +5V, +VSB, and +12V rails on an LCD screen. The unit requires no batteries and weighs 3.53 ounces. It measures 4.75 by 2.5 inches. You get a simple way to verify voltages without risking hardware damage during diagnostics.

Pros

• LCD display shows +3.3V, +5V, +VSB, and +12V readings
• Compatible with ATX, ITX, and BTX form factors
• No batteries required for operation
• Compact size at 4.75 x 2.5 inches

Cons

• Only tests four voltage rails (+3.3V, +5V, +VSB, +12V)
• Limited to 20+4 pin ATX connectors
• No mention of SATA or PCI-E pin testing in specs

Good fit if

• You need to verify basic ATX voltages quickly
• You want a battery-free testing tool
• You work with standard ATX or ITX builds

Skip if

• You require testing of SATA or HDD power rails
• You need PCI-E power connector support
• You prefer a larger display for easier reading

Verdict: JacobsParts 20+4 Pin LCD PSU Tester offers basic voltage checks for standard ATX systems. It fits users who need a simple, battery-free tool for core rail verification.

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