nPowerTek TTIC NPH-1 Heatpipe Heatsink Review
Transtech International Corporation (TTIC) are the company behind the 'nPowertek'
brand of heatsinks, and while many of you probably haven't ever
heard of nPowertek, or the NPH-1 Pentium 4 heatsink we are examining,
you may just want to stand up and take notice.
blue heatsink looks fairly unremarkable from the outside, but at the center
sits a 25mm diameter heatpipe which gives the NPH-1 some really serious kick. The large copper heatpipe stands 100mm
tall, and comes in direct contact with the processor core for optimal effectiveness.
TTIC have termed the heart of the NPH-1 a "heat column," even though it
is just a very large heatpipe based on a sintered metal wick.
As you know, heat pipes
work by moving heat energy from one location to another, and so for the NPH-1
to work as a heatsink that
thermal energy must be disposed of.
behind the beefy blue aluminum shroud are 30 aluminium
fins measuring roughly 70x80mm in size. The 25mm diameter heat pipe passes
up through the center of each of the 0.5mm thick aluminum fins, transferring
the heat energy to them in the process.
Two 70mm fans, one on
either side of the heatpipe and aluminum fin assembly provide the necessary airflow
to exhaust that heat from the fins to the surrounding environment,
and consequently keep the processor from overheating. The system worked so
well in fact that we had to test the nPowertek NPH-1 twice just to be sure
everything was working properly!
Sold By: www.npowertek.com
- Model: NPH-1
- HS Material: Aluminum fins, copper heat
(x2) 3600 RPM, 12V, 0.28A
- Fan Dim: 15x70x70mm
- FHS Dimensions: 96x108x87mm
- Weight: 450gram
- Made by: nPowerTek
|The TTIC "Heat Column" used at the center of the NPH-1 is 25mm in diameter, and 100mm tall. The company illustrates the various diameters and heights of 'heat columns' they offer, giving a better illustration of how the heat pipes are constructed.
Heatpipes themselves are really interesting little devices; as
heat energy from the processor reaches the heatpipe a reaction inside the copper tube begins
to occur. The copper cylinder is hollow, and sealed at both ends, but there is a small
amount of liquid inside, under a vacuum.
'working fluid' as it's called, absorbs the latent heat which causes it
to boil and undergo a phase change into water vapour. In our daily lives, water boils
at 100C, but as pressure is decreased the temperature gradient required to cause
water to boil also drops. In any case, the small amount of water inside
easily converts to water vapour as the temperature of the evaporator end of the
vapour is subsequently drawn to the cooler end of the heatpipe, and since that
side is cooler, it condenses. As
the hot vapour cools back into liquid, the heat energy that it previously
stored is transferred to the surrounding apparatus (the heatpipe wall, and the
fins which are in contact on the outside) on the condensation end of the
The condensed vapour, now working fluid once again,
is drawn back to the hot evaporator end of the heatpipe by capillary action
along an internal sintered metal wick structure which is porous. As the
liquid reaches the hot end once more, the entire process repeats.
are a closed loop process that work within certain temperature ranges, for
example 30C - 80C degrees. If the differential between the
hot and cool sides becomes too low (say for example, each side
reaches 85 degrees) the system can stall. Of course, with two fans to
keep the heatpipes' condenser end in the clear this isn't a likely situation for