Product Detail Minimal air resistance between fins allowing best balance between noise and performance in range of 800-1200RPM Heatpipes are lined up in a straight line to prevent air back draft allowing air to easily pass through the heatsink body Wide fins with mathematically calculated thickness to maximize best air-to-surface cooling rate Uniquely designed, easy-to-install socket 775 and 1366 retention mechanism to increase cooling ability. Easy to apply, high grade thermal compound, a perfect sidekick to all Prolimatech heatsinks . The "Prolimatech Megahalems Rev B. Intel CPU Heatsink LGA 775 / 1156 / 1366 AM2** / AM2+** / AM3**" is best product for you. We recommended Prolimatech Megahalems Rev B. Intel CPU Heatsink LGA 775 / 1156 / 1366 AM2** / AM2+** / AM3**