There is no single universal “PC case plug.” The power and reset switches, status LEDs, front USB, front audio, and case fans use different motherboard headers. Use the exact motherboard and case manuals to identify each cable and its matching header; do not rely on a generic pin map or wire color.
Before you connect anything
- Shut down and disconnect power. Unplug the PC before working inside the case.
- Identify both models. Find the motherboard model and the case model so you can consult their manuals.
- Locate the diagrams. In the motherboard manual, find the board layout and internal-connector or system-panel diagram. In the case manual, check the cable names and any instructions for hubs.
- Read each cable label. Case leads may be marked for power, reset, HDD LED, power LED, USB, HD Audio, or fans. Match the labels and connector type to the manual, not just the wire colors.
Header names and locations vary by board. ASUS notes that “The actual appearance and port nomenclature may vary depending on the specific manufacturer and model. Therefore, it is imperative to consult the motherboard manual for precise and accurate guidance.” ASUS support guidance, last updated April 21, 2025.
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Connect the power switch, reset switch, and LEDs
These small leads usually go to the motherboard’s system-panel header. Look for a label such as F_PANEL, PANEL, or JFP1, then use the board’s diagram to identify each pin. Do not assume pin positions from a diagram for a different motherboard: even ASUS manuals illustrate different board-specific layouts, such as the 10-1-pin system-panel connector shown for the P8H77-I. ASUS support guidance; P8H77-I manual.
Power and reset switch leads generally work in either orientation, but LED leads are polarity-sensitive. Follow the board diagram and any plus/minus markings on the leads. If an LED does not light after assembly, shut down and check its orientation against the diagram.
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Match each front-panel lead to its own header
Front USB
Connect a case USB cable only to a compatible internal USB header specified by the motherboard manual. USB 2.0, USB 3.x, and front USB-C use different header types and keying; a plug that looks close is not proof of compatibility. Check the case cable and board header descriptions before connecting. The reviewed ASUS manuals show multiple internal USB header types, reinforcing the need to match the exact connector. ASUS support guidance; P8H77-I manual; PRIME B550M-A manual.
Front audio
Find the motherboard’s front-panel audio header, often labeled AAFP or F_AUDIO, and connect the matching case lead. Some boards and cases document support for both HD Audio and legacy AC’97. For example, the ASUS H81M-P manual recommends HD Audio and says the BIOS front-panel type setting must match when AC’97 is used. That instruction applies to that example; consult your own board’s manual for its supported connector and settings. ASUS H81M-P manual.
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Connect case fans or a fan hub
A case fan may connect directly to a chassis or system-fan header, or it may connect to a hub whose cable then connects to the motherboard. Follow the fan or hub manual to locate the primary motherboard connection and understand its control behavior. ASUS advises consulting the case or fan-hub manual for the primary port. ASUS support guidance.
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- 【High-Density LED Array with 81+80 LEDs】Separate light strips for motherboard and GPU cables feature 80+81 LEDs respectively. The concentrated LED arrangement, combined with a light-guide diffusion layer, provides bright and uniform RGB illumination with smooth color transitions and reduced shadowing.
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- 【Tool-Free Installation with Cable Combs】Includes three sizes of combs compatible with 24-pin ATX and GPU power cables. The design fits various PSU cables and extensions—including sleeved, silicone, PVC, or braided types. Installation involves attaching to cables, managing wires, and connecting the 3-pin ARGB header.
- 【ARGB Synchronization & Customization】Supports synchronized lighting effects through standard 5V 3-pin ARGB headers. Users can utilize motherboard software to select from preset lighting modes, customize colors, or activate music and game sync modes for dynamic lighting effects.
Check the connections before powering on
- Confirm every cable is on the intended header and fully seated.
- Check that no plug is shifted by one pin.
- If the plug does not match the header, stop. Do not force it; verify compatibility in both manuals.
- If a status LED fails, disconnect power before checking its polarity against the system-panel diagram.
Without the motherboard and case model numbers, a reliable pin-by-pin map cannot be given. If you need that level of guidance, provide both model numbers.
Quick Recap
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- PWM Control Extension: Extend PWM fan cables from motherboard headers with this 4-pin fan extension cable. Eliminate the need for separate fan controllers, enabling fans to spin at synchronized speeds using motherboard PWM control.
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- VIBRANT ARGB LIGHTING WITH 108 LEDS: High-density LED layout delivers bright, evenly diffused RGB illumination across your motherboard power cable, creating a smooth lighting effect that enhances the visual impact of your PC build.
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