The alpine 11 pro rev2 is the ideal cost efficient heatsink for system builders the multi compatible cooler is suitable for upgrade or replacement of noisy stock coolers silent operation the buffered mounted 92 mm pwm fan with low noise impeller silently cools down your cpu with up to 95 w the fan creates even at full speed only 04 sone and hence is almost inaudibly silent easy installation the unique mounting system via push pins offers excellent stability and is applicable within seconds