Why you need this adapter Expand one 19pin USB 3.0 motherboard header into two 9pin ports so you can connect more internal devices (RGB controllers, fan hubs, liquidcooling sensors, USB 2.0 devices) without buying a motherboard or external hub. Solve clutter and compatibility issues by consolidating connections into a single, reliable internal adapter that supports common PC cooling and lighting needs. Key benefits Broad compatibility: Designed for mainstream motherboards with a 19pin USB 3.0 header and works with RGB fans, liquid cooling systems, fan sensors, and USB 2.0 internal controllers. Stable performance: quality conductive materials provide consistent signal transmission for dependable data transfer, accurate fanspeed reporting, and seamless RGB control integration. No drivers required: Plugandplay operation on the 19pin port keeps setup quick and straightforward across varied hardware configurations. Better cable management: Converts one 19pin header into two 9pin ports to reduce cable tangles, internal space, and make routing easier inside the chassis. Important attributes Function: Adapter cable converting a 19pin USB 3.0 motherboard header to two 9pin headers. Compatibility: Fits mainstream ATX and compatible motherboards with a 19pin header and supports devices that use 9pin USB 2.0style internal connectors (RGB controllers, fan hubs, sensor modules). Material & performance: Constructed with quality conductive materials for stable connections and reliable signal integrity. Size & installation: Compact internal cable form factor for easy routing and mounting inside most cases; plugandplay—no driver installation required. Typical use scenarios 1. Building a gaming PC with multiple RGB fans and an RGB strip: add an RGB controller and extra fans without occupying additional motherboard headers. 2. Upgrading a liquidcooling loop: connect pump/fan sensors and a fan hub to the motherboard through the single 19pin header for accurate monitoring and control. 3. Adding internal USB 2.0 accessories: power and communicate with internal controllers or small USB devices that use 9pin internal ports. Installation notes Plug the adapter into the motherboard's 19pin USB 3.0 header and connect your devices to the two 9pin ports. No drivers required; ensure correct pin orientation when installing to avoid misalignment. This adapter provides a practical, compact way to expand internal connectivity, improve cable organization, and maintain stable signal performance for RGB lighting, fans, sensors, and USB 2.0 devices.