Balance cooling between CPU and components on the motherboard. Higher ground clearance for better memory module compatibility. Larger heatsink for better performance. 12cm PWM fan provides versatile performance for full loading efficiency and for quiet idling. Compatible with 14cm fans (optional). Product Description Balance cooling between CPU and components on the motherboard. Higher ground clearance for better memory module compatibility. Larger heatsink for better performance. 12cm PWM fan provides versatile performance for full loading efficiency and for quiet idling. Compatible with 14cm fans (optional).