6 Best Alternatives to the JacobsParts 20/24-Pin LCD Power Supply (2026)
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You need jacobsparts 20 4 pin LCD power alternatives if the original tester does not fit your specific workflow. The JacobsParts unit is a simple tool for verifying core ATX voltages. It suits builders who need to confirm basic power rail stability without complex hardware. It is lightweight at 3.53 ounces and requires no batteries. This makes it a reliable choice for quick checks on standard ATX, ITX, and BTX power supplies. However, you might want a different size, color, or additional features.
Some technicians prefer portable aluminum bodies for better durability. Others need precise voltage data with automatic alarms for fault detection. The alternatives in this list were chosen because their specs overlap with the original. They all support ATX form factors and feature LCD displays. You can find options with different dimensions or connector testing capabilities. This guide helps you compare these tools based on their published specifications. You will see how each device handles voltage verification for your specific needs.
Our top pick: JacobsParts 20/24-Pin LCD Power Supply Tester.
Comparing alternative testers to JacobsParts
Optimal Shop 20+4 Pin LCD Power Supply Tester
The Optimal Shop model uses a compact aluminum body, measuring 8.3 by 3.7 inches. It weighs 3.2 ounces, which is slightly lighter than the JacobsParts unit at 3.53 ounces. Both devices feature black LCD displays for ATX voltage verification. This alternative focuses on portability and clear readings for standard ATX and peripheral connectors. You get a durable shell that fits easily into a technician's toolkit. If you value a robust metal casing over plastic, this is a practical choice. It maintains the same core function of checking power rails without adding unnecessary bulk. The slim profile makes it easy to store alongside other diagnostic tools.
Optimal Shop LCD ATX Power Supply Tester
This Optimal Shop tester also features an aluminum shell, but it comes in a golden color rather than black. It shares the same brand reputation for durable construction and clear LCD readouts. The device is designed for portable ATX and peripheral power supply diagnostics. You get reliable multi-connector testing in a sturdy package. Unlike the JacobsParts plastic unit, this model offers a premium feel with its metal exterior. It is ideal for technicians who need to carry the tool frequently. The golden finish makes it visually distinct on a workbench. It performs the same fundamental task of verifying voltage stability, ensuring you can trust the readings while working on various PC builds.
Comidox 20/24 Pin LCD Power Supply Tester
The Comidox tester measures 4.95 by 2.51 inches, which is slightly larger than the JacobsParts unit. It features a black LCD display and provides precise voltage data for standard ATX power supplies. A key difference is the inclusion of automatic alarms for fault detection. This adds a layer of safety that the basic JacobsParts model lacks. You get immediate audio-visual alerts when a voltage rail is out of spec. The device is designed for technicians who need reliable fault detection without complex setup. If you want more than just a static voltage reading, this tool offers active warning capabilities. It remains a straightforward plug-in solution for verifying power supply health.
ASHATA ATX LCD Power Supply Tester
The ASHATA tester is significantly smaller, measuring 3.94 by 1.97 inches. It weighs only 2.82 ounces, making it the lightest option here. The device features an LCD display for monitoring multiple voltage rails on ATX units. It provides precise voltage readings and clear signal monitoring. Like the Comidox, it includes audio-visual alerts for faults. This combination of compact size and active warning systems makes it ideal for technicians who need to verify multiple rails quickly. You get a tool that is easy to handle and store. The small footprint allows for use in tight spaces within a PC case. It delivers the same core voltage checks with added safety notifications.
ASHATA LCD Power Supply Tester
This ASHATA model shares the same compact dimensions and weight as the previous ASHATA tester. It measures 3.94 by 1.97 inches and weighs 2.82 ounces. The device features an LCD display for precise voltage monitoring of main connectors. It is designed for quick voltage checks on both ATX and ITX power supplies. You get a small, reliable tool for verifying power supply health. The compact design makes it easy to carry and use in various settings. It performs the same fundamental task as the JacobsParts unit but in a smaller form factor. If you need a minimalist tester that fits easily in your pocket, this is a strong candidate. It offers clear readings without adding bulk to your toolkit.
Yankok Digital PSU Tester with Backlit LCD
The Yankok tester features a backlit LCD display, which improves readability in low-light environments. It supports standard ATX, ITX, and BTX power supply testing. The device is self-powering, meaning it does not require external batteries. You get clear voltage readings and convenient operation for standard PC builds. The model number YKNT-PST-ATX04 identifies this specific variant. It includes alarm capabilities for fault detection, similar to other advanced testers in this list. This tool fits hobbyists and technicians who need a reliable verification method. The backlit screen is a practical feature for working in dark server racks or enclosed cases. It offers comprehensive support for various form factors while maintaining ease of use.
Quick picks
Our 7 picks
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
This JacobsParts tester checks ATX, BTX, and ITX power supplies without needing batteries. It connects to the 20/24-pin main connector and displays +3.3V, +5V, +12V, and +VSB readings on an LCD screen. The compact black unit weighs 3.53 ounces. It helps you verify voltage stability before installing components in your PC.
Pros
- Tests +3.3V, +5V, +12V, and +VSB rails
- Compatible with ATX, BTX, and ITX formats
- No batteries required for operation
- Compact size at 4.75 x 2.5 inches
Cons
- Does not test PCIe, SATA, or HDD connectors
- Single 20/24-pin main connector only
Good fit if
- You need to check basic ATX voltages
- You want a battery-free testing method
- You work with standard desktop power supplies
Skip if
- You require testing for SATA or HDD rails
- You need PCIe power connector verification
- You prefer a larger display for readability
Verdict: JacobsParts 20+4 Pin LCD PSU Tester is a simple tool for verifying core ATX voltages. It suits builders who need to confirm basic power rail stability without complex hardware.
Optimal Shop 20+4 Pin LCD Power Supply Tester
Best for: portable ATX and peripheral connector 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
This Optimal Shop tester checks 20-pin, 24-pin, and peripheral connectors. It features a 1.8-inch LCD screen and a buzzer alarm for PG signal failures. The aluminum alloy shell keeps it light at 3.2 ounces. You get voltage readings for +12V, +5V, and +3.3V on side connectors. It suits users needing a durable, portable tool for ATX and ITX power supply diagnostics.
Pros
- Tests 20-pin, 24-pin, SATA, IDE, and PCIe connectors
- 1.8-inch LCD screen displays output voltage
- Aluminum alloy shell for durability and heat dissipation
- Buzzer alarm indicates PG number failures
Cons
- Screen is prone to scratching without protective film removal
- Only displays voltage for +12V, +5V, and +3.3V on peripheral connectors
- No mention of auto-shutoff or overload protection features
Good fit if
- You need to test multiple connector types including SATA and IDE
- You prefer a lightweight aluminum build for portability
- You want audible alerts for power good signal failures
Skip if
- You require a large, high-resolution display for better readability
- You need to test connectors beyond the listed 8-in-1 options
- You prefer plastic housings that are less prone to screen damage
Verdict: Optimal Shop 20+4 Pin ATX Tester offers comprehensive connector testing in a compact aluminum body. It fits technicians who value portability and clear voltage readings for standard ATX and peripheral connectors.
Optimal Shop LCD ATX Power Supply Tester
Best for: Portable ATX and peripheral power supply diagnostics
- Form Factor
- ATX
- Display Type
- LCD Display
This Optimal Shop tester supports 20-pin, 24-pin, and various peripheral connectors including SATA and PCIe. It features a 1.8-inch LCD screen for clear voltage readings and an aluminum alloy shell for durability. The unit includes a buzzer alarm to signal PG number failures. It is designed for users who need a compact, portable tool for testing ATX, ITX, and BTX power supplies.
Pros
- Supports 8 connector types including 20/24-pin ATX and SATA
- 1.8-inch LCD screen displays output voltage clearly
- Aluminum alloy shell provides corrosion resistance and heat dissipation
- Built-in buzzer alarm indicates PG number failures
Cons
- Screen is prone to scratching and requires manual removal of protective film
- Smaller 1.8-inch display compared to larger LCD options on the market
- Limited to standard ATX/ITX peripheral testing without advanced diagnostic features
Good fit if
- You need a portable tester with an aluminum body
- You require support for SATA, PCIe, and floppy disk connectors
- You want audible alerts for power supply faults
Skip if
- You prefer a larger screen for easier reading
- You need testing for non-standard or proprietary connectors
- You want a device with a pre-applied screen protector that does not require removal
Verdict: Optimal Shop 20+4 Pin LCD Power Supply Tester offers reliable multi-connector testing in a durable aluminum shell, making it ideal for technicians who value portability and clear voltage readouts.
Comidox 20/24 Pin LCD Power Supply Tester
Best for: technicians needing precise ATX voltage data
- Form Factor
- ATX
- Display Type
- LCD Display
This Comidox tester checks ATX, BTX, ITX, and TFX power supplies via a 20 or 24-pin connector. The LCD screen shows voltage readings with 0.01V precision for 3.3V, 5V, 12V, -12V, SB+5V, and PG. An automatic buzzer warns you when values exceed normal limits. It also displays the status of SATA, IDE, and PCIe connectors. The compact black unit measures 4.95 by 2.51 inches.
Pros
- LCD displays voltage with +/-0.01V accuracy
- Automatic buzzer alarms for abnormal values
- Tests 20-pin and 24-pin ATX interfaces
- Checks SATA, IDE, and PCIe outputs
Cons
- Smaller LCD screen than many competitors
- No remote control included
- Does not support USB power testing
Good fit if
- You need precise voltage readings for ATX units
- You want automatic fault alarms via buzzer
- You test multiple connector types like SATA and PCIe
Skip if
- You require a large, high-resolution display
- You need wireless connectivity or app support
- You only test older 20-pin units without 24-pin compatibility
Verdict: Comidox 20/24 Pin LCD Power Tester delivers precise voltage data and automatic alarms for standard ATX power supplies, making it a solid choice for technicians who need reliable fault detection without complex setup.
ASHATA ATX LCD Power Supply Tester
Best for: monitoring multiple voltage rails on ATX units
- Form Factor
- ATX
- Display Type
- LCD Display
- Dimensions
- 3.94 × 1.97 × 0.79 inches
- Weight
- 2.82 ounces
This ASHATA tester checks 20/24-pin ATX, 4/6/8-pin, and SATA interfaces. Its LCD screen shows real-time voltage for +12V, -12V, +5V, -5V, +3.3V, SB, and PG signals. It alarms if voltages fall outside normal ranges. The device measures voltage to 0.01V precision. It weighs 2.82 ounces and fits easily in a kit. It suits users who need clear, immediate feedback on power supply health without complex setups.
Pros
- LCD displays +12V, -12V, +5V, -5V, +3.3V, SB, and PG signals
- Intelligent buzzer alarm for abnormal voltage parameters
- Supports 20/24-pin ATX, 4/6/8-pin, SATA, and PCI-E interfaces
- High precision voltage measurement of 0.01V
Cons
- Only supports ATX form factor, not ITX or BTX
- No mention of a carrying case or protective pouch
- Single unit only, no multi-pack option listed
Good fit if
- You need to monitor multiple voltage rails simultaneously
- You prefer visual LCD feedback over LED indicators
- You test 20/24-pin ATX and SATA connectors regularly
Skip if
- You primarily test ITX or BTX power supplies
- You require a tester for PCIe 12VHPWR connectors
- You need a compact tool for tight spaces under 2 inches wide
Verdict: ASHATA ATX Power Supply Tester with LCD provides precise voltage readings and clear signal monitoring for standard ATX systems. It is ideal for technicians who need to verify multiple rails and receive immediate audio-visual alerts for faults.
ASHATA LCD Power Supply Tester
Best for: Quick voltage checks on ATX and ITX PSUs
- Form Factor
- ATX
- Display Type
- LCD Display
- Dimensions
- 3.94 × 1.97 × 0.79 inches
- Weight
- 2.82 ounces
This ASHATA tester checks ATX, ITX, BTX, and PCI-E power supplies via a 20 or 24-pin connector. Its LCD screen shows voltage readings with 0.01V accuracy and triggers a 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 to quickly verify PSU stability without complex tools.
Pros
- LCD display shows voltage with 0.01V precision
- Automatic buzzer alarm for abnormal readings
- Compact size at 3.94 by 1.97 by 0.79 inches
- Tests ATX, ITX, BTX, and PCI-E standards
Cons
- External SATA and P4/P6/P8 connectors only show lights, not voltage on the LCD
- No digital readout for auxiliary power rails
- Limited to basic voltage and PG value checks
Good fit if
- You need a compact tool for quick PSU checks
- You want to verify voltage stability with high precision
- You test multiple form factors like ATX and ITX
Skip if
- You require voltage readings for SATA or P4/P6/P8 connectors
- You need a tester with a larger display for better readability
- You want to test power supplies without a 20/24-pin main connector
Verdict: ASHATA 20/24 Pin LCD PSU Tester offers precise voltage monitoring for main connectors. It fits users who need a small, reliable tool for verifying ATX and ITX power supply health.
Yankok Digital PSU Tester with Backlit LCD
Best for: Standard ATX, ITX, and BTX power supply testing
- Form Factor
- ATX
- Display Type
- LCD Display
The Yankok tester checks vital voltages for ATX, ITX, and BTX power supplies. It displays +5 VSB, +12V, +3.3V, and +5V on a backlit LCD screen. The device powers itself from the PSU connector, so you do not need batteries. It includes an audible alarm for voltage failures. This tool suits hobbyists and technicians needing a quick functional check of motherboard and peripheral connectors.
Pros
- Backlit LCD displays +5 VSB, +12V, +3.3V, and +5V
- Self-powered via 20-pin or 24-pin PSU connector
- Audible alarm triggers on detected voltage failures
- Compatible with ATX, ITX, and BTX form factors
Cons
- Only tests standard ATX, ITX, and BTX voltages
- No dedicated test leads for peripheral connectors listed
- Plastic ports may feel less durable than metal alternatives
Good fit if
- You need a self-powered tester for quick checks
- You work with ATX, ITX, or BTX boards
- You want an audible alarm for voltage errors
Skip if
- You require testing for non-standard server PSUs
- You need metal construction for heavy industrial use
- You want to test peripheral connectors with cables
Verdict: Yankok ATX 20/24 Pin LCD PSU Tester provides clear voltage readings and self-powering convenience for standard PC builds. It fits hobbyists and technicians who need a reliable, alarm-equipped tool for ATX, ITX, and BTX power supply verification.
Specifications side by side
| Spec | JacobsParts 20/24-Pin LCD Power Supply Tester | Optimal Shop 20+4 Pin LCD Power Supply Tester | Optimal Shop LCD ATX Power Supply Tester | Comidox 20/24 Pin LCD Power Supply Tester | ASHATA ATX LCD Power Supply Tester | ASHATA LCD Power Supply Tester | Yankok Digital PSU Tester with Backlit LCD |
|---|---|---|---|---|---|---|---|
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| Display Type | LCD Display | LCD Display | LCD Display | LCD Display | LCD Display | LCD Display | LCD Display |
| Weight | 3.53 ounces | 3.2 ounces | not specified | not specified | 2.82 ounces | 2.82 ounces | not specified |
| Dimensions | not specified | 8.3 × 3.7 × 0.8 inches | not specified | not specified | 3.94 × 1.97 × 0.79 inches | 3.94 × 1.97 × 0.79 inches | not specified |
| Color | Black | Black | Golden | Black | default | default | not specified |
| Model | not specified | Optimal Shop | Optimal Shop | not specified | not specified | not specified | YKNT-PST-ATX04 |
| Size | not specified | not specified | not specified | 126x64x18.5mm/4.95x2.51x0.72inch | not specified | not specified | not specified |
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Frequently asked questions
Can I use these testers on ATX and ITX power supplies?
Yes, several models support multiple form factors. The ASHATA LCD tester verifies ATX and ITX PSU health. The Yankok unit checks ATX, ITX, and BTX supplies. This flexibility allows you to test various standard PC builds without needing separate tools for each connector type.
Do these testers provide audio alerts for faults?
Some models include automatic alarms for voltage issues. The Comidox tester delivers precise data and triggers alarms for standard ATX supplies. The ASHATA ATX tester also offers immediate audio-visual alerts. These features help you quickly identify unstable power rails without staring constantly at the display.
Which alternative is the most portable?
The ASHATA LCD Power Supply Tester is highly portable. It measures 1.97 by 0.79 inches and weighs only 2.82 ounces. Its compact size makes it easy to carry in a toolbag. You can take it to different workstations for quick voltage checks on various systems.
How do these LCD displays help with diagnostics?
The LCD displays show precise voltage readings for each rail. The Optimal Shop model provides clear readouts for standard ATX and peripheral connectors. The Yankok tester features a backlit LCD for better visibility. These visual indicators let you verify core power stability without connecting complex monitoring hardware.
Is there a tester with a durable aluminum body?
The Optimal Shop 20+4 Pin LCD Power Supply Tester features a compact aluminum body. This construction enhances durability for technicians who value rugged tools. It weighs 3.2 ounces and measures 8.3 inches in length. The sturdy design protects the internal components during frequent use in busy workshops.
Can these testers power themselves from the PSU?
Yes, these devices draw power directly from the connectors they test. The Yankok tester offers self-powering convenience for standard PC builds. This design eliminates the need for external power sources or batteries. You simply plug it into the PSU to begin verifying voltage rails immediately.
What is the best option for budget-conscious technicians?
The Comidox 20/24 Pin LCD Power Supply Tester is a solid budget choice. It delivers precise voltage data and automatic alarms for fault detection. It requires no complex setup. This model suits technicians who need reliable diagnostics for standard ATX supplies without unnecessary features or high costs.