Asus Silent Square EVO Socket AM2+/1207+/939/940/754 Copper Base/Alum Heat Sink & 3.6" Blue LED Fan w/5 Copper Heatpipes Asus Silent Square EVO Heat Sink and Fan General Features: Aluminum fin heat sink Copper base with aluminum coating Five (5) 6 mm Copper heat pipes with aluminum coating Best choice for Quad-Core CPU support Extremely quiet at a mere 22 dBA Waved fins enable maximum heat dissipation that lower CPU temperature by 20 - 30% Universal clip design for easier installations