Product description What it does Converts a 15pin SATA power plug into a standard 3pin or 4pin (PWM) 12V PC case fan power connector. Allows you to power one case fan directly from a SATA power line from the PSU, freeing motherboard fan headers and simplifying power for additional fans. Key benefits Easy expansion: power extra case fans without depending on motherboard headers. Simple installation: plug the SATA connector into a PSU cable and plug the fan onto the 3pin or 4pin connector. Clean routing and durability: density black sleeving provides a neat look and protects the cable. Reliable performance: fan receives a stable SATA 12V supply for consistent operation. Important attributes Connectors: 15pin SATA power to standard 3pin fan or 4pin PWM fan connector. Compatibility: works with standard 3pin case fans and 4pin PWM fans (backwards compatible with 3pin fans). Voltage/operation: fans are powered at fixed 12V from SATA power. (Note: when powered by SATA, motherboard PWM speed control is not provided through this adapter.) Length: 11.8 inches (30 cm), long enough for typical PC cable routing. Material: density black sleeving for durability and a professional appearance. Typical use scenarios 1. Add extra case fans when your motherboard has no fan headers: plug the adapter into a SATA power cable to run additional fans. 2. a damaged motherboard fan header: power the fan directly from the PSU using the SATA adapter. 3. Use in small builds or external enclosures where PSU SATA power is available but a fan header is not. Quick installation steps 1. Connect the 15pin SATA end to an available SATA power cable from your PSU. 2. Plug the fan's 3pin or 4pin connector into the adapter. 3. Route the sleeved cable as needed for a tidy build. Includes clear, compatible connections and sturdy sleeving to keep your cooling setup reliable and easy to manage.