| 360° View - Zalman Fatal1ty FS-C77 Heatsink
Information on Frostytech's test
methodology is available
The Heatsink Fan:
120x120x25mm fan spins at a fixed speed of 2400RPM. According to FrostyTech's real
world sound measurements this translates into a noise level of about 56 dBA. The
lack of a fan guard can be problematic if errant wires
find their way into the path of the red LED illuminated
seven-bladed impeller - so keep you case clean and tidy on the
inside when using this heatsink. The heatsink draws power from a standard
3-pin motherboard fan header, and supports RPM monitoring. Since airflow
is directed downward, components adjacent to the CPU socket are also cooled to some
degree. Zalman recommends that motherboards have at least 136mm of clearance around the center of
the CPU, where no capacitors or other devices stand more than 39mm tall
for the FS-C77 to fit properly.
Removing the 120mm fan gives
us a clearer idea of how the entire FS-C77 heatsink is put together.
Each copper fin is 0.4mm thick. The central base section
is 41.5mm wide, and from tip to tip the heatsink measures 136mm x 136mm.
The cut out in the center of the base section is for the clipping mechanism which applies
pressure at the center of the Zalman Fatal1ty FS-C77 heatsink. One of the nice aspects of the red clear coat is that it should prevent the copper from oxidizing over time.
Heatsink Side A:
Standing 68mm tall, the Zalman Fatal1ty FS-C77 is a fairly compact heatsink
in the vertical sense. Each red copper fin are spaced about 2.0mm apart on average along the outside
edge. The spring clip mounted just under the fan uses two different clips ("type-s" and "type-L") depending on what processor the FS-C77 is being installed on.
Heatsink Side B:
From this angle you can see how the copper fins gradually
to form the body of the Zalman
Fatal1ty FS-C77 heatsink. Compressed under high pressure the fins make intimate contact at
the base which is then machined absolutely flat.
The bevel in the shape of the heatsink is so it will clear
the certain heatsink retention frames, and any capacitors placed near to the
socket. Accordingly, Zalman recommend that no component be higher than 39mm
if it is within 136mm of the center of the processor socket.
The base measures 35mm x 41mm, and it has
been machined perfectly flat and smooth so raw metal comes
in contact with the CPU core. Surface roughness is equivalent to ~8
microinches. Seeing as the copper fins are the base, and the base is the same slice of copper that is the fins, thermal conductivity
is as direct as can be expected. The stainless steel slots where
the two types of mounting clips slot into are just visible on
either side of the base.