Looking Beyond the Comidox 20/24 Pin LCD Power? 6 Alternatives Worth a Look

How the Alternatives Compare

Optimal Shop 20+4 Pin LCD Power Supply Tester

The Optimal Shop 20+4 Pin tester shares the LCD display and ATX form factor but offers a different physical profile. It measures 8.3 inches in length and 3.7 inches in width, making it slightly wider than the Comidox unit. The weight is 3.2 ounces. This model focuses on standard ATX verification with reliable readings for common PC components. It lacks the specific dimensional details of the Comidox but provides a sturdy build for technicians. You should choose this if you prefer a slightly broader footprint for easier handling during routine voltage checks.

Optimal Shop LCD ATX Power Supply Tester

This Optimal Shop model distinguishes itself with a durable aluminum body and a golden finish, contrasting with the Comidox’s black plastic construction. It supports multi-connector diagnostics, allowing you to check various peripheral connections quickly. While the Comidox focuses on voltage and PG values via LCD, this unit emphasizes versatile connectivity in a robust frame. It is ideal for technicians who need to verify different connector types beyond the main ATX interface. The aluminum build suggests better heat dissipation and durability, making it a strong choice for frequent use in a professional workshop environment.

ASHATA ATX LCD Power Supply Tester

The ASHATA ATX tester is significantly more compact than the Comidox. It measures 3.94 inches in length and 1.97 inches in width, weighing just 2.82 ounces. This small form factor makes it easier to store or carry. Like the Comidox, it uses an LCD display for ATX power supply verification. However, it sacrifices some of the larger display area for portability. It is designed for quick voltage checks and identifying faulty units without complex setup. If you need a minimalist tool for basic output verification, this compact option offers a practical alternative to the larger Comidox device.

ASHATA LCD Power Supply Tester

This ASHATA model matches the compact dimensions of the previous ASHATA unit, measuring 3.94 inches by 1.97 inches and weighing 2.82 ounces. It provides clear voltage readings and an alarm for main connectors, similar to the Comidox’s automatic fault alerts. The key difference is its focus on main rail checks for standard ATX supplies. It avoids complex wiring, making it straightforward for users who need fast results. While the Comidox offers a larger LCD screen, this ASHATA version prioritizes ease of use and quick identification of issues in standard power supplies, fitting users who value simplicity and speed.

JacobsParts 20/24-Pin LCD Power Supply Tester

The JacobsParts tester supports ATX, ITX, and BTX power supplies, matching the Comidox’s versatility in connector types. It weighs 3.53 ounces and features a black finish. A notable advantage is its self-powering design, which eliminates the need for extra batteries. This makes it a simple, battery-free device for quick health checks. While the Comidox also displays voltage and PG values, the JacobsParts unit focuses on basic voltage verification across multiple form factors. It is a practical choice for users who need a reliable, low-maintenance tool for verifying standard rails without worrying about power sources for the tester itself.

Yankok Digital PSU Tester with Backlit LCD

The Yankok Digital PSU Tester features a backlit LCD, which may improve visibility in low-light conditions compared to the standard LCD on the Comidox. It supports ATX, ITX, and BTX checks and uses a self-powering design, removing the need for batteries. This model is built for technicians who need to verify standard rails and peripheral connections efficiently. While the Comidox provides detailed voltage readings with automatic alarms, the Yankok unit emphasizes clarity and ease of use through its backlit display. It is a strong option for users who prioritize clear readouts and versatile form factor support in a compact, battery-free package.

Quick picks

Our 7 picks

1 Best overall

Comidox 20/24 Pin LCD Power Supply Tester

Best for: testing standard ATX power supplies

Form Factor

ATX

Device Compatibility

PCs

Display Type

LCD Display

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

The Comidox 20/24 Pin LCD PSU Tester checks ATX, BTX, ITX, and TFX power supplies. It connects to the 20-pin or 24-pin connector to display voltage and PG values on an LCD screen. The device measures +3.3V, +5V, +12V, -12V, and SB+5V. It includes a buzzer alarm for faults. This tool helps you verify power supply outputs quickly and accurately.

Pros

• LCD screen shows voltage and PG values
• Buzzer alarm for automatic fault warnings
• Supports ATX, BTX, ITX, and TFX formats
• Measures +3.3V, +5V, +12V, -12V, and SB+5V

Cons

• Does not display voltage for SATA or IDE connectors
• Only measures voltage for 20-pin or 24-pin interfaces
• No mention of external probe support for other connectors

Good fit if

• You need to test standard ATX power supplies
• You want automatic fault alarms
• You prefer visual voltage readings

Skip if

• You need to test SATA or IDE voltage directly
• You require external probe support
• You want a display for all connector types

Verdict: Comidox 20/24 Pin LCD PSU Tester is a practical tool for verifying standard ATX power supply outputs. It fits users who need quick, visual voltage checks with automatic fault alerts.

2 Also great

Optimal Shop 20+4 Pin LCD Power Supply Tester

Best for: Standard ATX power supply verification

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 checks 20-pin and 24-pin ATX connectors plus SATA, IDE, and PCIe cables. The 1.8-inch LCD screen shows voltage readings directly from the connector. An aluminum alloy shell keeps it light at 3.2 ounces. A buzzer alarm signals PG number failures. You get clear data for standard PC power builds without extra complexity.

Pros

• Tests 8 connector types including 20-pin, 24-pin, SATA, and PCIe
• 1.8-inch LCD displays output voltage clearly
• Aluminum alloy shell provides corrosion resistance
• Buzzer alarm indicates PG number failures

Cons

• Screen is prone to scratches without careful handling
• Limited to standard ATX and peripheral connectors
• No USB or data logging capabilities

Good fit if

• You need to verify standard ATX voltages quickly
• You want a lightweight tool for bench testing
• You prefer visual LCD readings over LED indicators

Skip if

• You require testing for non-standard or proprietary connectors
• You need data logging or USB connectivity
• You are testing high-wattage server power supplies

Verdict: Optimal Shop 20+4 Pin LCD Power Tester delivers essential voltage checks for standard ATX builds. It fits technicians who need fast, reliable readings for common PC components.

3 Also great

Optimal Shop LCD ATX Power Supply Tester

Best for: Multi-connector PSU diagnostics

Form Factor

ATX

Display Type

LCD Display

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

This Optimal Shop tester checks 8 connector types, including 20-pin, 24-pin, SATA, and PCI-e. The 1.8-inch LCD screen shows output voltages clearly. An aluminum alloy shell keeps it light and durable. A buzzer alarm signals PG number failures. It suits users who need a compact, multi-format tool for ATX and ITX power supply diagnostics.

Pros

• Tests 8 connector types including 20/24-pin, SATA, and PCI-e
• 1.8-inch LCD screen displays output voltages
• Aluminum alloy shell for durability and heat dissipation
• Buzzer alarm indicates PG number failures

Cons

• Screen requires manual removal of protective film
• Limited to 1.8-inch display size
• Does not test main 20/24-pin voltage output directly

Good fit if

• You need a single tool for multiple connector types
• You prefer a lightweight aluminum build
• You want audible alerts for power issues

Skip if

• You require a larger display for better readability
• You need to test main 20/24-pin voltages directly
• You prefer a plastic casing for lower cost

Verdict: Optimal Shop 20+4 Pin LCD PSU Tester offers versatile connectivity in a durable aluminum body. It fits technicians who need to check various peripheral connectors quickly and accurately.

4 Also great

ASHATA ATX LCD Power Supply Tester

Best for: Quick voltage checks on standard ATX power supplies

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

This ASHATA tester checks ATX power supplies using 20-pin or 24-pin connectors. It features an LCD screen that shows real-time voltage readings for +12V, +5V, and +3.3V rails. The device measures voltage with 0.01V precision and triggers an alarm if values fall outside normal ranges. It supports SATA, PCI-E, and floppy interfaces. Its small size and light weight make it easy to handle for quick maintenance checks.

Pros

• LCD display shows real-time voltage for multiple rails
• Measures voltage with 0.01V precision
• Supports 20-pin, 24-pin, SATA, and PCI-E connectors
• Built-in alarm for abnormal voltage parameters

Cons

• Only tests power supply output, not load stability
• No data logging or PC connectivity features
• Basic buzzer alarm without visual fault codes

Good fit if

• You need a quick way to check if a PSU powers on
• You want to verify voltage rails without building a full system
• You repair computers and need a portable testing tool

Skip if

• You require load testing to see how the PSU performs under stress
• You need to test server-grade or proprietary power supplies
• You want to monitor power usage over time

Verdict: ASHATA ATX PSU Tester with LCD is a compact tool for verifying basic power supply output and voltage stability. It fits users who need to quickly identify faulty units without complex setup.

5 Best budget

ASHATA LCD Power Supply Tester

Best for: Quick main rail voltage checks

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

The ASHATA power tester checks ATX, ITX, BTX, and TFX supplies. It features an LCD display showing voltage with 0.01V accuracy. An automatic buzzer alarms if values fall outside the normal range. It connects to the main 20 or 24-pin connector. The unit is small, measuring 3.94 by 1.97 inches. It weighs 2.82 ounces. This tool helps you quickly verify power supply stability without complex multimeter setups.

Pros

• LCD screen displays voltage with 0.01V precision
• Automatic buzzer alarm for abnormal readings
• Compatible with ATX, ITX, BTX, and TFX forms
• Compact size of 3.94 by 1.97 inches

Cons

• SATA and P4/P6/P8 connectors only show LED lights, not voltage on LCD
• Requires connection to the 20 or 24-pin main connector for full voltage display
• Does not include external adapters for detailed rail testing

Good fit if

• You need a quick visual check of main rail voltages
• You want an automatic alarm for faulty power supplies
• You test various form factors like ITX or BTX

Skip if

• You require precise voltage readings for individual SATA or P8 rails
• You prefer a digital multimeter for detailed troubleshooting
• You need to test power without the main 24-pin connector

Verdict: ASHATA 20/24 Pin LCD Power Tester offers clear voltage readings and an alarm for main connectors. It is ideal for users who need fast, reliable checks on standard ATX supplies without complex wiring.

6

JacobsParts 20/24-Pin LCD Power Supply Tester

Best for: Basic voltage verification in ATX and ITX PSUs

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 using a 20/24-pin connector. It displays +3.3V, +5V, +VSB, and +12V rails on an LCD screen. The unit weighs 3.53 ounces and measures 4.75 by 2.5 inches. It requires no batteries. You can use it to verify voltages before installing components. It is a compact tool for basic PSU health checks.

Pros

• Displays +3.3V, +5V, +VSB, and +12V rails
• Compatible with ATX, ITX, and BTX form factors
• No batteries required for operation
• Compact size at 4.75 by 2.5 inches

Cons

• Only tests four voltage rails
• Lacks PCI-E or SATA connector testing
• No built-in fan control features

Good fit if

• You need a simple tool for basic voltage checks
• You work with ATX, ITX, or BTX power supplies
• You want a lightweight tester that requires no batteries

Skip if

• You require testing of PCI-E or SATA connectors
• You need to test more than four voltage rails
• You want a tester with fan speed control

Verdict: JacobsParts 20+4 Pin LCD PSU Tester is a straightforward tool for verifying basic voltages in ATX, ITX, and BTX power supplies. It fits users who need a simple, battery-free device for quick health checks.

7 Best premium

Yankok Digital PSU Tester with Backlit LCD

Best for: Verifying ATX, ITX, and BTX PSU voltages

Form Factor

ATX

Display Type

LCD Display

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

The Yankok digital power supply tester checks ATX, ITX, and BTX units. It displays +5 VSB, +12V, +3.3V, and +5V on a backlit LCD. The device powers itself via the 20-pin or 24-pin connector, so you do not need batteries. It includes an audible alarm for voltage failures. It also tests peripheral connectors like SATA, IDE, and PCI-Express.

Pros

• Backlit LCD displays +5 VSB, +12V, +3.3V, and +5V
• Self-powered via 20-pin or 24-pin PSU connector
• Audible alarm detects voltage failures
• Tests SATA, IDE, and PCI-Express peripheral connectors

Cons

• Does not mention testing 4/6/8-pin CPU connectors
• Limited to ATX, ITX, and BTX form factors
• No battery backup for standalone operation

Good fit if

• You need to verify standby and main rail voltages
• You work with ATX, ITX, or BTX power supplies
• You want an audible warning for voltage errors

Skip if

• You require testing of 4/6/8-pin CPU power connectors
• You need a tester for non-ATX server units
• You prefer a device with a battery-powered mode

Verdict: Yankok ATX/ITX/BTX PSU Tester offers a clear LCD readout and self-powering design for quick ATX, ITX, and BTX checks. It fits technicians who need to verify standard rails and peripheral connections without extra batteries.

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