Specification

ZEROTHERM BTF90 BUTTERFLY SILENT PWM CONTROLLED COOLER - QPCZERBTF90

Compatibility Intel LGA775 and AMD AM2/939 
Dimension 108(L) x 81(W) x 128(H) mm 
Material Aluminium with copper base and heatpipes  Copper 
Heat Dissipation Area 4400cm² 
Cooling Capacity Up to 120W  Up to 150W 
Fan Dimension 92 x 25 mm 
Fan Speed Automatic fan speed control by PWM 
Fan RPM 750 - 2500 *
Noise Level 27 dBA Max, normally under 18 dBA *
Air Flow 42.8 CFM Max 
Fan Connector 4-pin, 4-wire (PWM) 
Weight 458g  678g

ZEROtherm’s flagship coolers the BTF90 and BTF80 are virtually identical with the only obvious difference being the material they are manufactured from. The BTF90 is full copper and the BTF80 is all aluminium. If you want the best performance then the full copper version would be ideal, but if you are concerned about the weight then the aluminium version would be recommended. Apart from weight, the difference in material also affects performance. The full copper heatsink can cope with CPU that generate up to 150W, whereas the aluminium version can handle up to 120W CPUs. This means both coolers will cope with the vast majority of CPUs available, especially Intel’s Core 2 Duo CPUs.