Specification
ZEROTHERM BTF95 BUTTERFLY FANLESS COPPER COOLER - QPCZERBTF95
-Compatibility Intel LGA775 and AMD AM2/939
-Dimension 108(L) x 81(W) x 128(H) mm
-Material Copper
-Heat Dissipation Area 2576cm²
-Cooling Capacity Up to 100W
-Fan None, although some airflow is required
-Weight 678g
At first glance you may be fooled in thinking the ZEROtherm BTF95 is just a BTF90 without a fan (and a more elaborate butterfly attached to the top of the heatsink). But in fact there is one thing that makes the BTF95 a better heatsink than the BTF90 when you want to run the heatsink fanless. This difference is the pitch between the fins.
Left BTF95, right BTF90. As you can see the pitch between the fins on the BTF95 is larger. The BTF95 has 31 horizontal fins, compared to the BTF90’s 46
The importance of having a larger pitch between the fins is to make it easier for the low amount of airflow to circulate around the fins. When the fins are too close to each other the air is restricted from circulating and therefore the fins will not cool down as much as a heatsink with a larger pitch. This makes the BTF95 an excellent fanless CPU heatsink. Especially for CPUs that output less than 100W, like Intel’s new Core 2 Duo.
