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New Standards in Energy Efficiency
With the same performance, the S12038-4K server fan consumes 12% less than the next best competitor, improving the energy efficiency of your server. The reduction in power consumption is the result of months of motor optimization by ARCTIC engineers with the goal of increasing the efficiency of IT equipment.
*Test setup: Fan on Freezer 4U heatsink on 400 W heating element; fan speed set so that the temperature of the heating element is constantly 20 °C above the ambient temperature.
Wide Speed Range (600 to 4000 rpm)
The S12038-4K has a wide speed range from 600 to 4000 rpm, which can be controlled via both PWM and voltage regulation. This wide range enables precise adjustment of the fan to the specific requirements of the server, ensuring efficient cooling performance under different operating conditions. The fan is equipped with a standard 4-pin connector, which also allows connection to 2-pin or 3-pin headers. The 30 cm long cable offers additional flexibility when positioning the fan.
Active Cooling for Longer Motor Service Life
A 10 °C lower motor temperature roughly doubles the service life. The motor of the S12038-4K is not only particularly efficient, but is also actively cooled by an additional impeller in the fan hub.
The scope of delivery includes a sticker for the motor hub, which ensures a long service life even in dusty environments.
Ideal for Server Environments
Especially in server environments, fans with a high pressure are required to enable sufficient air circulation in the often tightly packed enclosures. The S12038-4K fits into server enclosures from 3U/3U and is used as an upgrade or replacement for a CPU fan, radiator fan or for system ventilation.
High Airflow and Static Pressure
Heatsinks and radiators benefit from fans with high static pressure. The S12038-4K has a static pressure of 11.45 mmH₂O, which enables it to push air through even narrow cooling fins. At the same time, it achieves a maximum airflow of 180 m³/h and can therefore quickly dissipate heat from enclosures. These properties make it the ideal choice for a wide range of applications.
Designed for Continuous Operation
The impeller of the S12038-4K is held by two high-quality Japanese ball bearings in a sturdy brass housing. This design increases longevity and minimizes sensitivity to influences such as heat and dust. In addition, the brass housing contributes significantly to reducing wear on high-speed fans.
Technical Data
Power Output
Speed: 600-4000 rpm PWM-controlled
Air flow: 106 cfm | 180 m³/h
Static pressure: 11.45 mmH₂O
Fan
Connection: 4-pin socket
Fan bearing: Double ball bearing with brass housing
Operating ambient temperature: -10~70 °C
Electrical Characteristics
Starting voltage: 3.1 V DC
Current | voltage: 0.33 A | 12.0 V DC
Current (maximum): 0.60 A
Size & Weight
- Length: 120 mm
- Width: 120 mm
- Height: 38 mm
- Weight: 320 g
Review Master
Reviewed in the United States on March 2, 2025
Let me start off by saying this fan is an absolute tank. I've never in my life held a fan in my hand and not been scared of dropping it. With this one, you could legitimately throw it around and play catch with, and it would probably survive the abuse. It's heavy and thick, and not just the outer case but the blades as well; a bit thicker than your average case fan. I took pictures of it pre-install with the measurements, but my phone died before I could salvage the pics. It moves a decent amount of air; however, I have 2 complaints. Although you can control the fan through the BIOS with both PWM and DC output adjustment, the fastest speed this puts out is a bit over 3600 rpm, under 3700 rpm. It is advertised and rated for 4,000 rpm, so what's going on here? Same with another review I read. Another issue is that this fan is LOUD when set at anything past, say, 2200 rpm, so in reality, it's only practical up till this speed. Anything more and it sounds like a plastic RC plane about to take off. Still, at 2200rpm or a tad bit more, depending on your taste for loud fans, it seems to move plenty of air. I give it 4 stars because 3 stars is a bit unfair given how well built this thing is, but if there was a 3.5 star, that would be my rating. I also like the fact that the fan comes with plenty of cable (4-pin PWM) and produces no vibration noise when mounted correctly.
Customer
Reviewed in the United Kingdom on February 8, 2025
Needed a super high performance fan that could run on a standard motherboard header without exceeding the 1A limit, these were perfect, they move tons of air but they are also very loud as expected, even at low speeds they have some noise, but they are not intended for gamer builds that sit on your desk, these are for servers where they can run at top speed comfortably
Luigi
Reviewed in Italy on February 28, 2025
Arrivata con perdita importante di olio e grippata.Restituita.
James Decker
Reviewed in the United States on February 17, 2025
Love it uses very little electricity great product
Tigerlight
Reviewed in the United Kingdom on January 9, 2025
Expecting a 4000rpm, 38mm thick, highly aggressive server fan to be as quiet as a Noctua is, frankly, ludicrous. If you have anything to say about the noise of these fans, at all, you are not the intended audience.These have massive static pressure and will move buckets of air through any obstacle by sheer brute force.What I care about is cooling effectiveness, and for the price? These things are simply fantastic.
Schöberlein
Reviewed in Germany on January 6, 2025
ist zu laut, läuft immer mit zu hohen drehzahl
alex
Reviewed in the United States on January 5, 2025
the cooler is as in the description. At high speeds it is very noisy, if for the server then it is not critical. It would be nice if the noise level was indicated on the website.
Decker
Reviewed in the United Kingdom on January 5, 2025
I put these server fans in my PC case, I knew that they would be louder at high speed but they really push the air through the case and provide great cooling. At lower speeds they are just as quiet as normal pc fans and I like the fact that I have greater air flow when needed.
Normano
Reviewed in the United States on January 4, 2025
Before this I use a regular fan, the temperature it pulled out was 38C. I was doing recoding & my GPU was at 98 to 99% & the GPU temp was 88C. My i9-14900 was about 30% in usage.I remember those server fans in the server room. So I got this & the temp it pulled out is now 10c lower; even though the temperature of the components remain almost unchanged. I should have get the 8K.
GUSS
Reviewed in the United States on December 18, 2024
This fan may look normal size but the base is thicker.It works on mine but yea , my fan only went to 3689rpm speed , not 4000rpm but it's fine.I like it !
Curtis McLauren
Reviewed in the United States on December 16, 2024
These fans are perfect if your system has high resistance and need high air pressure to cool efficiently. It is an industrial level case fan so it will be noisy at high RPM. Dual ball bearing fans are great for 24x7 usage, and the value is awesome! Similar Delta, Sanyo Denki, and AVC fans usually cost a lot more than just over 11 bucks.
Kuno
Reviewed in the United States on November 5, 2024
I bought theses to replace some GTFAN 12038 that were in my diskshelf as the dual ball bearings were loud. The server is in the basement and the fans that came with it could be heard on the main floor. With these, I need to actually be near the case to hear the fans. I bought these even though it was impossible to find actual reviews on them, or any data that is not Arctic marketing. It also didn't help that Arctic refused to answer questions on their reddit sub about these fans.Suffice to say, they keep my drives cool, and do so at only 1400rpm. The GTFAN that were in my case prior were keeping the drives at the same temp while running at 2300rpm. I have not had the pleasure of having theses fans ramp up to their full speed, and I do not think I will as they are doing a phenomenal job at 1400rpm. The highest temps I saw during a parity check was 40C. I might have a hot spot I need to deal with.I am wondering if the 7k fans would keep my drive even cooler at the same rpm.Overall, these fans are great. The price is right, being cheaper than those 30mm Phanteks. If you have the clearance, you should be using theses instead.
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