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The Thermal Transtech International Corp. nPowertek NPH 775-1 Socket 775 heatsink looks deceptively simple at first glance; but at the heart of this Intel cooler is a huge copper cylinder. The large copper column is not technically a heatpipe as we know it, it's what TTIC call a "heat column." This column, 25mm in diameter and made from a hollow copper cylinder which is vacuum sealed, has a chemical coating on the inside that works to the same effect as a wick in a traditional heatpipe.
Looking specifically at this heatsink, the heat column transfers heat from the processor core vertically up to approximately 30 copper fins of 60x75mm in size. The 25mm diameter copper column passes up through the center of each of the 0.2mm thick copper fins, conducting heat to each in the process. A single 70mm fan blows air over all the fins, and if you wish another fan can also be added on the opposite side too.
nPowertek's NPH 775-1 heatsink weighs in at 615 grams, making it a pretty heavy candidate for Intel LGA775 processor cooling. The 18x80x80mm looks a little timid for an open framed cooler of this size, but it seems to get the job done without much fuss.
The metal fan support frame connects to the extruded aluminum base, and simply rests on the top of the heatsink by the red cap. The base is designed to mount on socket 775 processors only, using the through-PCB holes and a rear motherboard support bracket which is included with the cooler. Four spring tensioned metric screws hold the 615gram heatsink firmly in place once it is installed.
The Heat Column
According to this documentation by QuTech , the heat column used here is essentially an empty cylinder of copper which has been internally coated with a thin "superconducting heat transfer medium." The copper cylinder is sealed off at both ends, and inside is under a vacuum of approximately 1 Torr.
Patent no. 6,132,823 explains QuTech's process steps for producing the unit used in the nPowertek NPH 775-1 heatsink, and it's entitled Superconducting Heat Transfer Medium. Here is a short excerpt from the patent which explains the technology in plain english... but feel free to skip ahead to the actual heatsink review.
FrostyTech's heatsink test methodology is outlined in detail here if you care to know what equipment is used, and the parameters under which the tests are conducted. Now let's move forward and take a closer look at this heatsink, its acoustic characteristics, and of course it performance in the thermal tests!
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