Comidox 20/24 Pin LCD Power Review: Who It Fits and Who Should Skip It
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This comidox 1pcs 20 24 pin LCD computer PC power supply review focuses on a compact diagnostic tool. The Comidox 20/24 Pin LCD Power Supply Tester checks ATX, BTX, ITX, and TFX units. It connects directly to the main power connector. An LCD display shows voltage readings with +/-0.01V accuracy. A buzzer warns you when values exceed normal limits. The device measures 3.3V, +5V, +12V, -12V, SB+5V, and PG signals. It also indicates output wire status for SATA and IDE connections. This tool helps you verify power supply health quickly and intuitively without complex equipment.
What stands out
- LCD display with +/-0.01V voltage accuracy
- Automatic buzzer alarm for out-of-range values
- Supports 20Pin and 24Pin ATX interfaces
- Detects ATX, BTX, ITX, and TFX power supplies
- Compact size of 126x64x18.5mm
Who it fits
Good fit for
This tester suits PC builders and technicians who need a quick way to verify power supply outputs. It is ideal for those who want to check multiple voltage rails without setting up a full system. The automatic alarm feature helps you spot faulty units immediately. If you work with various form factors like ITX or TFX, this tool covers them all. Its small size makes it easy to store in a toolkit. You will appreciate the clear LCD readouts for precise diagnostics.
Who should skip it
You should look elsewhere if you need a tool for live system testing. This device only tests the power supply in isolation. It does not measure load stability under stress. If you require software-based monitoring for running systems, this hardware tester will not help. It also lacks support for non-ATX proprietary connectors. Users expecting a display for external SATA voltage will find only LED indicators. It is strictly for bench testing power supply units before installation.
Verdict: This tester is a practical choice for verifying power supply voltages on the bench. Its clear display and automatic alarms make diagnostics straightforward and efficient.
Key specs explained for this tester
Display Type: LCD Display
You get a liquid crystal screen instead of just LEDs or a buzzer. This allows you to read exact voltage numbers rather than guessing based on lights. The screen shows +3.3V, +5V, +12V, -12V, and PG status. You can see if a rail is drifting out of spec. This clarity helps you verify if a power supply is stable before installing it in your case.
Supports 20Pin, 24Pin ATX interface
The tester plugs into the main motherboard connector found in almost all desktop PCs. You do not need adapters for standard ATX units. This compatibility covers older systems with 20-pin connectors and modern builds with 24-pin connectors. It ensures the tool works with the vast majority of computer power supplies you might encounter during troubleshooting or hardware upgrades.
Accuracy: +/-0.01V
The voltage readings are precise to one hundredth of a volt. This level of detail lets you spot minor fluctuations that standard multimeters might miss. You can verify if a +12V rail is actually delivering 12.05V or 11.90V. Tight tolerances help you identify aging components or weak capacitors in older power supplies that could cause system instability under load.
Size: 126x64x18.5mm
The unit is compact and fits easily in a tool bag or on a workbench. Its small footprint means it does not take up much space when you are testing multiple units. You can handle it with one hand while connecting cables. The portable design makes it convenient for technicians moving between different workstations or for hobbyists working in tight spaces.
Compact design and simple layout
According to the listing, this tester measures 126 by 64 by 18.5 millimeters. It is black and relatively thin. This small footprint means it fits easily into a tool bag or a drawer. You do not need a large workspace to use it. The simple physical form keeps the focus on the screen and the connector pins.
The device connects directly to the ATX power supply. It supports 20-pin and 24-pin main connectors. It also handles SATA, 4-pin, 8-pin, and PCI-E 6-pin interfaces. You plug the tester into the power supply cable. The LCD screen then activates. It displays voltage readings for +3.3V, +5V, +12V, -12V, and SB+5V. The PG signal is also shown. If a value is out of range, the buzzer sounds and the number flashes. This immediate feedback helps you spot issues without complex setup.
There are no buttons or switches to manage. The design relies on automatic detection. This reduces the chance of user error. You simply connect and read. The finish is plain black plastic. It is built for function rather than aesthetics. This makes it suitable for technicians who need a reliable, no-nonsense tool for quick diagnostics. The size ensures it does not get in the way during bench testing.
Setup And Daily Usage Guide
Setup is straightforward because the device connects directly to the main power connector. You plug the tester into the ATX interface of your power supply. This includes 20-pin and 24-pin connectors. It also supports SATA, 4-pin, 8-pin, and 6-pin PCI-E graphics card interfaces. The listing notes that external SATA, P6, and P8 connections are indicated by lights rather than LCD voltage readings. Only the 24-pin or 20-pin connections provide the full LCD voltage display.
In daily use, the LCD screen provides an intuitive readout. It shows output voltage and PG values. The accuracy is listed as plus or minus 0.01V. This allows you to see exact numbers rather than relying on generic indicators. The tool measures multiple voltage groups, including +3.3V, +5V, +12V, -12V, and SB+5V. It also checks PG status. If any parameter exceeds normal limits, the buzzer sounds a warning. The corresponding value on the screen will flash to draw your attention.
This tester works with ATX, BTX, ITX, and TFX computer power supplies. It is designed for quick detection of PC power performance. The small size, measuring 126 by 64 by 18.5 millimeters, makes it easy to handle during routine checks. You do not need complex software or additional cables. The automatic fault alarm helps you identify issues without constant monitoring. This setup is ideal for technicians or enthusiasts who need to verify power supply stability quickly. The complete test interface covers most standard PC power connectors, making it a versatile tool for routine diagnostics.
Before you buy this tester
This tool is a diagnostic aid, not a power source. You must connect it to a working PC power supply to get readings. It does not generate electricity. Ensure your PSU supports ATX, BTX, ITX, or TFX standards. The device checks 20-pin and 24-pin main connectors. It also tests SATA, 4-pin, 8-pin, and 6-pin PCI-E cables. Keep the LCD screen clean. Dust can obscure voltage readings. Store it in a dry place to protect the electronics. This tester complements other PSU reviews by letting you verify output stability. It helps you confirm if a unit meets its specifications. You should use it alongside multimeters for deeper analysis. It fits well into a technician’s toolkit. It is ideal for verifying new builds or replacing old units. Check your power supply’s connector types before purchasing. This ensures compatibility with your specific hardware setup.
Check before you buy
- Verify your PSU uses 20-pin or 24-pin ATX connectors.
- Confirm the power supply supports ATX, BTX, ITX, or TFX.
- Ensure you have a working power supply to test with.
- Check that your PSU includes SATA and PCI-E cables.
The product at a glance
Comidox 20/24 Pin LCD Power Supply Tester
Best for: Verifying standard ATX power supply voltages
- Form Factor
- ATX
- Device Compatibility
- PCs
- Display Type
- LCD Display
View on Amazon: Comidox 20/24 Pin LCD Power Supply Tester Affiliate link
This tool checks if your PC power supply is working correctly. It connects to 20-pin or 24-pin ATX connectors. The LCD screen shows voltage readings for +3.3V, +5V, +12V, -12V, and PG. It also displays status for SATA and PCIe cables. A buzzer warns you if values are out of range. It fits small spaces at 126x64x18.5mm.
Pros
- LCD displays voltage with +/-0.01V accuracy
- Detects ATX, BTX, ITX, and TFX power supplies
- Buzzer alarms when parameters exceed normal values
- Shows output status for SATA and PCIe cables
Cons
- LCD voltage display only works for 20-pin or 24-pin connections
- No voltage reading for floppy drive interface
- Limited to basic voltage and PG testing
Good fit if
- You need to quickly verify ATX power supply outputs
- You want visual voltage confirmation on an LCD
- You require automatic fault alarms for safety
Skip if
- You need to test power supplies without 20/24-pin ATX connectors
- You require detailed analysis beyond basic voltage checks
- You need to test floppy drive interface voltages
Verdict: Comidox ATX Power Supply Tester provides clear LCD voltage readings and automatic alarms for standard ATX units. It fits users who need a compact tool to verify basic power supply health.
Specifications side by side
| Spec | Comidox 20/24 Pin LCD Power Supply Tester |
|---|---|
| Form Factor | ATX |
| Device Compatibility | PCs |
| Display Type | LCD Display |
| Size | 126x64x18.5mm/4.95x2.51x0.72inch |
| Color | Black |
Frequently asked questions
Does this tester work with 24-pin connectors?
Yes, the Comidox unit supports both 20-pin and 24-pin ATX interfaces. You can plug it directly into the main power connector of your power supply. This compatibility ensures it works with most modern desktop systems. The listing confirms it handles the standard connectors found in current PC builds.
What voltages does the LCD screen display?
The LCD display shows exact voltage readings for +3.3V, +5V, +12V, and -12V. This allows you to verify if the power supply is delivering stable power to your components. Instead of guessing from LED lights, you get precise numbers. The screen also indicates the status of each rail clearly.
Is this device a power source or a tester?
It is a diagnostic tool, not a power source. You must connect it to a working PC power supply to get readings. It does not generate electricity itself. Think of it as a multimeter that plugs directly into the motherboard socket. It checks the health of the PSU you are testing.
Does it support graphics card connectors?
Yes, the tester includes support for SATA, 4-pin, 8-pin, and 6-pin PCI-E interfaces. This allows you to check voltages on additional power lines beyond the main ATX connector. You can verify if the power supply provides stable power to your graphics card and drives. This adds versatility to your diagnostics.
How small is the Comidox power supply tester?
The device measures 126 by 64 by 18.5 millimeters. It is black and relatively thin. This compact footprint means it fits easily into a tool bag or drawer. You do not need a large workspace to use it. Its small size makes it convenient for technicians who travel or have limited desk space.
Can it test BTX or ITX power supplies?
The listing states it checks ATX, BTX, ITX, and TFX units. This broad compatibility means it works with various form factors. You can use it to verify basic power supply health across different system types. Ensure your PSU supports these standards before relying on the readings for diagnosis.