PCIe 16X Slot Tester Card with LED – Motherboard Diagnostic
PCIe 16X Slot Tester Card with LED – Motherboard Diagnostic
PCIe 16X Slot Tester Card with LED Indicators
Take the guesswork out of desktop motherboard diagnostics with this professional-grade PCIe 16X Slot Tester Card. Simply insert it into any PCIe 16X slot to instantly identify open or short circuits in the Southbridge chipset — helping you determine whether issues stem from a faulty graphics card, damaged chip, or isolated capacitor. Powered conveniently via USB Type-C or a standard 6-pin GPU power connector, this compact diagnostic card is an essential addition to any PC technician's toolkit.
Made in Mainland China.
Key Features
- Instant PCIe 16X Diagnostics: Insert into the PCIe 16X slot to automatically detect open or short circuits in the Southbridge — no manual probing required.
- LED Fault Indicator Array: Press the onboard switch to illuminate all LEDs simultaneously. Any unlit LED pinpoints the corresponding Southbridge pin for further inspection, including isolation capacitor checks.
- Flexible Power Input: Accepts 6–24V DC via USB Type-C cable or directly through a motherboard 6-pin GPU power connector. Activate by shorting the 24P power supply green and black wires.
- Software-Controlled Circuit: Rapidly diagnoses Southbridge open/short conditions, streamlining the workflow and eliminating the need for a separate resistance card.
- Essential Repair Tool: Ideal for diagnosing motherboards that fail to POST (FF code or no display), or systems exhibiting unstable GPU output — covers the most common display-related desktop failures.
- PCB Construction: Durable printed circuit board build designed to withstand repeated insertion cycles in a busy repair environment.
Specifications
| Item Type | PCIe 16X Slot Tester Card |
| Material | PCB |
| Voltage Range | 6–24V DC |
| Power Input | USB Type-C or 6-Pin GPU Connector |
| Battery | Not required |
| Country of Origin | Mainland China |
What's in the Box
- 1 × PCIe 16X Tester Card with LED Indicators
- 1 × USB Type-C Cable
How to Use
- Short the green and black wires of the 24P ATX power supply to activate it, OR connect power via Type-C cable.
- Insert the tester card firmly into the PCIe 16X slot on the motherboard.
- Press the onboard switch — all LEDs should illuminate.
- Any LED that remains off indicates a fault at the corresponding Southbridge pin or isolation capacitor.
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Frequently Asked Questions
Q: Which motherboards is this PCIe 16X slot tester compatible with?
A: This PCIe 16X tester card is compatible with any desktop motherboard that features a standard PCIe 16X (x16) expansion slot. It is particularly useful for diagnosing ATX and Micro-ATX form factor boards that are failing to boot, displaying an FF POST code, or producing no video output.
Q: Does the PCIe tester card need an external power source?
A: The tester supports two power options: you can connect a USB Type-C cable (6–24V DC input) or use the motherboard's 6-pin GPU power connector. No additional batteries are required, making it quick to set up on a workbench.
Q: What does it mean if one of the LEDs does not light up?
A: Each LED on the card corresponds to a specific Southbridge pin or signal line. If any LED fails to illuminate when you press the switch, that indicates a potential open or short circuit on the corresponding pin, or a damaged isolation capacitor — giving you a clear starting point for further board-level repair.
Q: Can this card diagnose GPU issues as well as motherboard faults?
A: Yes. By isolating the PCIe slot signals, the tester helps you determine whether a no-display or unstable graphics issue originates from the motherboard's Southbridge circuitry or from the graphics card itself, saving significant diagnostic time.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.