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CR-100A CPU Heatsink

Nofen CR-100A heatsink is undoubtedly the most interesting part of Nofen Set A40 system. It is pretty large and of a truly unique shape. Take a look:


And now imagine that the diameter of this large heatsink is 222 mm and it is 132 mm tall! Being that enormous Nofen CR-100A occupies the entire compact system case and covers everything there is on the mainboard. We are going to see it later one when we will be putting this system together, and at this point I only have to add that it weighs 783 g.

The design of this heatsink is fairly simple. There are four 6 mm copper nickel-plated heatpipes coming out of the copper base. They are split in two pairs going different directions and form two semi-circles. Beneath the heatpipes there are two grooves with the manufacturer’s name embossed in their bottom part. Numerous fins made of 2 mm aluminum wire are soldered to the top of the heatpipes:

In fact, these wires are the heat- dissipating surface of the heatsink. So, it is hard to say what the effective heatsink surface is in this case.

Heatpipes lie inside special grooves and are soldered to the base plate:

The thinnest part of the copper nickel-plated base beneath the heatpipes is 2 mm.

The base is impeccably even and is polished to mirror shining perfection. Moreover, it has a sophisticated flower drawn on its surface:

We saw the same flower on the box of our Nofen Set A40 system with “FDP” abbreviation below it. We didn’t manage to find out what this abbreviation stands for. It could be some kind of a marketing trick or the name of a new secret technology.

The photographs below show the thermal grease imprints left by the heat-spreaders of our processors on the cooler base:



The LGA1155 processor has an unevenly convex heat-spreader, so the imprint also turned out asymmetrical. At the same time the heat-spreader of our LGA1366 processor left a decent imprint on the Nofen CR-100A base, although we had to use more thermal grease than normal.

Nofen CR-100A comes without any fans and there is no spot for a fan anyway. In other words, the heatsink should provide effective cooling solely due to its size and unique design. Note that the manufacturer doesn’t overestimate the system’s potential by setting excessively ambitious goals and warns the users that the maximum processor TDP that their Nofen CR-100A heatsink can cope with shouldn’t get beyond 100 W. there is a very easy-to-read diagram about it on their official web-site:

It shows clearly what processors can be cooled with a Nofen CR-100A heatsink and what processors shouldn’t.

Another thing to keep in mind during the heatsink installation is the correct positioning of the heatsink on the CPU. Nofen addresses this matter on the following picture:

It shows that the heatsink must be installed with the heatpipes coming out of the base in a horizontal plane, and not up or down, which is also a possible way to install.

The heatsink is then fastened using a special backplate at the bottom of the PCB…

And a set of four screws that go into special tall bushes:

The heatsink is pressed very firmly against the processor due to the presence of springs on the screws, and the retention itself is highly reliable for a heatsink of this size (it is not too heavy after all).

When the heatsink is installed onto the processor there is a 40 mm gap between the PCB and the lowest heatsink fin, so the memory modules with tall heat-spreaders will definitely not fit in there. Moreover, forget about any tall components within 115 mm distance from the processor heat-spreader. For example, this is what Nofen CR-100A looks like on Foxconn H67A-S mainboard inside the Nofen CS-30 system case:

Looks very crowded, I should say. The only PCI Express slot on the mainboard is completely covered by the heatsink. However, the ATX mainboard barely fits into a case like that even without the heatsink on it:


I am sure you understand that it is all caused by the small system case. And to make your life easier, Nofen lists all the mainboards compatible with this case and the processor heatsink on their official web-site:

At this point the list is pretty short, but I am sure it will grow bigger with time.

I would also like to add that although Nofen doesn’t offer too many products at this time, they also have a slightly larger case – CS-60. You can use this case for a fanless system with a proper mainboard featuring several PCI express slots and a discrete graphics card.

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