Globalwin CAK4-88T Copper Heatsink Review
There are a
few major heatsink manufacturers which produce the staples of the cooling world,
and Globalwin is one of them. The CAK4-88T is an all copper skive heatsink
with a thermally controlled 80mm fan for lower-noise sensitivity. When
the heatsink is not very hot, the fan spins at a slower RPM which
produces less noise. When the thermistor senses an increase in temperature, the
fan speed kicks in to full RPM, and the heatsink receives an added
boost necessary to keep temperatures under control.
Since the copper skive
portion of the Globalwin CAK4-88T is just 70mm in size, Globalwin have added
an 80mm-70mm fan adaptor to the package. The fan adaptor is made from
translucent blue plastic and features an ingenious curved divider down the
Standing 18mm tall, the fan adaptor adds some
height to the overall cooling package, but only marginally so.
- Model Name: CAK4-88T
- Fan Specs: 2000-4000RPM, 38-45CFM, 12V, 0.40A.
- Fan Dim: 25x80x80mm
- Heatsink Dim: 87x70x70mm
- HS Material: Copper 1100, aluminum
- Mfg by: Globalwin USA
Sold By: www.globalwinusa.com
Looking down onto the heatsink with the blue fan adaptor
in place, the heatsink has a very nice appearance. The
fan adaptor has once downside, and that revolves around the plastic itself. While reviewing the
GlobalWin CAK4-88T and CAK4-76T we swapped out different fans several times and this caused cracks
in the plastic around the screw holes.
Obviously, if the plastic which is supposed to be holding the fan in place
fails, that poses a potential problem. A more flexible/durable plastic would be
a good option to consider for Globalwin, or perhaps some material reinforcement
around the screw holes to prevent cracking in the first place.
The clear plastic fan you see below has a small thermistor at the end of a
wire coming from the motor housing. When the fan is installed on the rest of the
heatsink this thermistor is supposed to be positioned in between two of the
copper fins, or between the copper fin and the aluminum frame.
In this way, it is in direct contact with the metal and
able to sense temperature changes to effect an increase in fan RPM. The RPM
change is triggered between 30-38 degrees Celsius where fan RPM increases from
2800 to 4000RPM. In its' lowest state the fan is very quiet. When it kicks up to
full RPM, the noise levels become atypical.