Xigmatek Nepartak S983 HDT CPU Cooler Review

By testtcm | Last Updated: October 31, 2018


Xigmatek are a company renowned for their excellent cooling solutions especially their HDT CPU coolers. Today, at Verdis Reviews we have a three dual heatpipe HDT cooler that features Xigmatek’s patented anti-vibration mounts along with the popular tower-format layout. Whilst nor being aimed at high end cooling, this cooler should provide some pretty solid results. Introducing the Xigmatek Nepartak S983 HDT…

Company Information – Xigmatek

Purpose and targets of becoming one of the world’s leaders in thermal PC Industry were set for Xigmatek Co. Ltd in 2005, the founding year! To ensure reaching this project aims, Xigmatek’s management followed up with hard work, experiences and customer friendly business style.

Honing one of the world’s most efficient manufacturing operations, Integration Presence in major economic regions, being tied up with most important strategic alliances between suppliers and academia and further majority investments in R&D are some of Xigmatek’s aggressive incensement strategies.




Contents & Packaging

Keeping in style with Xigmatek’s flamboyant and colourful packaging, the packaging is not your average cuboid; instead the curved front has a cut out window giving a sneak preview of the heatsink inside. The stylish swirls at the bottom which presumably are meant to represent air and cooling look very stylish. The main features are also listed at the top to provide some information.

The back sees the full table of specifications along with some contact information at the bottom; on the side an image of the base (HDT) is displayed.

A number of accessories are included mainly for installation purposes:

The anti-vibration mounts are Xigmatek’s alternative to wire clips for installing the fan; the advantage is that that they also act as vibration dampeners.

The Product – Xigmatek Nepartak

The Xigmatek Nepartak incorporates the highly popular tower format design which combines three dual heatpipes which dissipate heat through a large raised fin stack. The main heatsink is constructed from an array of aluminium fins and is actually a little smaller (and much lighter) than some of the tower-format coolers on the market that are truly monstrous.

The three dual heat pipes are bent into a ‘U’ shape forming the HDT (Heatpipe Direct Touch) base and then pass through the fin stack on both sides so as to give maximum heat dissipation.

The copper heatpipes have been left with their natural finish and just polished up as well as rounded off neatly at the top to give a more professional look. On the top also is a Xigmatek logo printed into the metal and on both sides a number of slits has been cut into the fins.

The base as I mentioned before is HDT which means that the heatpipes themselves are flattened to create the contact area; thus the heat is transferred directly to the heatpipes in order for maximum dissipation. The downside to this is that the base is not entirely smooth but Xigmatek have done a pretty good job in making it a very good contact surface for the CPU.

The base is also covered with a plastic seal to stop any dust or fingerprints from ruining the finish which is nice to see.

Peeling this off shows that the base is not very reflective but this shouldn’t be a problem.

Included with the heatsink is a 92mm black Xigmatek fan that can be installed onto either side of the cooler using the anti-vibration rubber mounts; it is a seven blade design and can produce airflow of up to 52CFM spinning at 2800RPM. The estimated noise outputs are 20-28dBA which is roughly similar to most coolers so it shouldn’t be too high.

Finally, the fan uses a PWM connector and so the fan speed is automatically controlled through the BIOS.


The Test Setup:

Processor Intel C2Q Q9450 Quad Core @ 2.80GHz
Motherboard Gigabyte S-Series GA-73PVM-S2H
Graphics Card XFX 8600GT
Memory Corsair XMS2 PC6400 (2x 1GB)
Hard Drive Hitachi HDT7250 (250GB)
Power Supply NOX Apex 700W
OS Windows XP Pro 32bit

The first step is to screw on the push-pins or clip depending on which socket you have. I am using LGA775 and so will be using the push-pin clips. They simply screw on to each side of the base.

The fan can be installed before installing the heatsink or after it is attached to the motherboard. I chose the former and so the first step was to attach the anti-vibration mounts by pulling them through each of the holes in the corners of the fan.

The larger end of the mounts then pulls over one fin and into the groove in the side of the cooler; once all four are in, the fan is held on very securely.

Then apply a small blob of thermal grease to the CPU and place the cooler on top in the correct orientation. To secure it, push down diagonal pins at the same time until they lock into place.



At Verdis Reviews, we test CPU coolers by booting the PC up into Windows XP and then taking temperatures in both idle and load states.

The temperatures are taking using Speedfan using the PC’s own diode. For idle testing, we simply leave the PC for 30 minutes and then come back and take the temperature readings. For load, we both two processes of CPU Burn-in and then again leave the computer for 30 minutes before taking a representative reading.

All temperatures are the average of three readings all take 10 seconds apart so as to give the most reliable results.

The cooler will also be tested at different fan speeds to see how it performs.

Finally, noise is that final factor that is tested; however, at Verdis Reviews, we are not yet at the stage where we can use high tech sound equipment and therefore, noise testing is left to the human ear – not the most scientific but it gives a good impression of how noisy the cooler is.

Ambient temperature was 20 degrees and a number of coolers with be used for comparison purposes.



The cooler comparison features two very high end coolers (the Noctua NH-U12P and the Scythe Kama Angle) and so these are not really there for direct comparison but more of a guide. However, the GELID Silent Spirit is a similar price range cooler and the Nepartak is able to shave a degree or two off it at both idle and load.

This is impressive as the GELID cooler is a good little heatsink and so the fact that the Nepartak is able to beat it reinforces how good it is. Moreover, the cooler is really not far behind the high end coolers, only about 2-3 degrees which is impressive for a mid range cooler. Needless to say, the Nepartak is far superior to the stock cooler.

The fan speed testing offers a nice drop down and even at low speeds the temperatures do not reach very high levels which is good to see.

NoiseIn terms of noise generated by the fan, it’s about average: the noise levels aren’t ultra quiet but they aren’t unbearable either. However, what is really good are the anti-vibration mounts for installing the fan as they cut out all the vibrations that might get transferred and so none of them are amplified.

CostThe Nepartak retails at £24 – you’d do well to find a better tower-format cooler at this price.


The Xigmatek Nepartak is a very compact, incredibly well-built CPU cooling unit. The temperatures that it is able to achieve are really very good from a cooler in the mid-range category and it is able to beat some very similar rival competitors whilst not being far behind the big boys.

The cooler looks very attractive and attention to detail is first rate even with the packaging. There are only a couple of minor negatives: the installation method whilst being very quick and easy can cause some motherboards to bend a little and the noise outputs aren’t particularly low but these aren’t really much of a an issue when you look at the bigger picture.

The Nepartak comes highly recommended from Verdis Reviews and is certainly a great contender if you’re looking for a compact, well-performing CPU cooler.




Thanks go to Xigmatek for providing the CPU cooler for review.