Gail Honeyman(Author)
OONO
24/20-Pin ATX DC Power Supply Diagnostic/Breakout Board Module
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
OONO 24/20-Pin ATX DC Power Supply Diagnostic/Breakout Board Module.1, 24-pins Standard ATX Connector, support 20 / 20+4 / 24 pins wire header. With latching button switch to control ATX power supply output ON/OFF.2, Total 16 LEDs, it is convenient for you to diagnose the functions of all pins except COM/GND, therefore, if the output of any one wire of your ATX power supply is faulty, it can be seen at a glance.3, High quality screw terminal blocks. Each terminal position support current output maximum 10 Amp. Pitch 5.0mm/0.197 inch, Wire range 26AWG to 12AWG / 2.5mm square.4, Packing list: 1…
SpecPicks Verdict
SpecPicks classifies 24/20-Pin ATX DC Power Supply Diagnostic/Breakout Board Module as a solid pick with broad community endorsement in the power supplies & cables category, based on 17 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. OONO's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.4★ customer rating
- ✓ Packing list: 1x Diagnostic breakout board, 4x Screws, 4x Nylon spacers.
- ✓ Backed by OONO's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- 24-pins Standard ATX Connector, support 20 / 20+4 / 24 pins wire header. With latching button switch to control ATX power supply output ON/OFF.
- Total 16 LEDs, it is convenient for you to diagnose the functions of all pins except COM/GND, therefore, if the output of any one wire of your ATX power supply is faulty, it can be seen at a glance.
- High quality screw terminal blocks. Each terminal position support current output maximum 10 Amp. Pitch 5.0mm/0.197 inch, Wire range 26AWG to 12AWG / 2.5mm square.
- Packing list: 1x Diagnostic breakout board, 4x Screws, 4x Nylon spacers.
- Special Note: The PS_ON LED lights up when the output is OFF and goes out when the output is ON, this is just the opposite of the indication status of other LEDs. Since many new ATX power supplies no longer provide output -5V, the NC/-V LED will not light up when connected to this type ATX power supply.
Full Specifications
| Brand | OONO |
|---|---|
| Form Factor | ATX |
| Packing list | 1x Diagnostic breakout board, 4x Screws, 4x Nylon spacers. |
| Compatibility | Switch |
| Connector Type | ATX |
| Cooling Method | Air |
| Current Rating | 10 Amps |
| Mfr Part Number | D-1478 |
| Number of Items | 1 |
| Compatible Devices | Personal Computer |
| Connector Quantity | 1 |
| Power Supply Design | Internal |
| Number of Connectors | 1 |
| Minimum Input Voltage | 12 Volts (DC) |
Ready to buy?
24/20-Pin ATX DC Power Supply Diagnostic/Breakout Board Module is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
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