Thermaltake Spirit A100 All Aluminum Chipset Cooler w/ Blue LED Silent Fan- CLC0051. Aluminum Forged Processing : High density aluminum provides excellent thermal performance. High Cooling LED Fan : High Cooling Performance with 40mm silent LED fan,19dBA, offers highest surface area. Patterned Heatsink Design: Create the smart airflow and optimize the heat dissipation. Good Compatibility & Easy Installation : With special universal mounting design, Spirit A100 can fit the main stream motherboard.