|360° View - Scythe Mugen (SCINF-1000)
Frostytech's test methodology is available here.
The 120x120x25mm fan is held in
place on the Scythe Mugen with a pair of springy wire clips. A second
120mm fan may be installed onto the opposite side of the heatsink if
desired (not included), or 90mm fans can be attached to either edge. The
fan spins at a low 1200RPM, generating less than 38dBA noise according to
Frostytech's real world sound measurements. It connects via a standard
3-pin fan header to the motherboard and supports RPM monitoring.
Scythe call the overlapping fins here the
"Infinity Interleave Fin Structure". Every other fin is a different width,
some 42mm and others 96mm wide. This gives the Mugen heatsink its
distinctive fin density right around the heatpipes, and wide fin pitch at
the center of the heatsink where airflow is reduced. The voids between the
aluminum fins are meant to aide slower airflow moving through the cooler
with as little resistance as possible. Each aluminum fin is 0.38mm thick,
and spaced 3.5mm or 1.5mm apart.
Poking out the top of the Scythe Mugen
heatsink are the tips of five "U" shaped 6mm diameter copper heatpipes. To
help reduce pressure drop a 5mm plenum is left behind the fan motor.
Springy wire clips will hold a 120mm fan firmly in place on any one of
four sides of the heatsink. Only one pair of 120mm sized clips is
provided. The ten heat pipe ends are covered with false nuts for the sake
of appearance. The bulk of the heatsink is 125x114mm in size.
Heatsink Side A:
The Scythe Mugen heatsink stands 155mm tall,
the fins making up 108mm of that total height. There is 38mm space below
the bottom most fin to provide clearance for adjacent motherboard
components. At the bottom is the extruded aluminum heatsink which the
mounting clips lock into. The five 6mm diameter heatpipes are soldered
between the aluminum extrusion and a 2mm thin copper base plate below. The
Mugen heatsink is 125mm wide, so you might want to measure your
motherboard clearances first before picking this unit up.
The Scythe Mugen is a big heatsink. The false nuts
covering the heatpipes add an additional 14mm to its overall height
The copper base soldered onto the bottom of
the Scythe Mugen heatsink measures 45x52mm in size. It is very smoothly
polished with a surface roughness of ~8 microinches. The base is generally
very flat, but very slightly concave in one axis. The extruded aluminum
section above the copper base provides rigidity and a place for the
mounting clips to transfer force directly onto the CPU core. The copper
plate itself is quite thin, just 2mm thick in fact. The heatpipes, copper
base and small extruded aluminum heatsink are all soldered together.