Fractal Design Celsius S24


Fractal Design is a Swedish company known for their minimalist design of their products. The color scheme present in F.D products is black and white, scheme present in cases, power supplies and fans. The concept of Fractal Design is to provide products with an extraordinary level of design, without compromising the important factors of quality, functionality and pricing.

Official product link:


Packaging and accessories

The Celsius S24 liquid cooler is packaged in a black and blue cardboard box that follows the design style of the packing used with the previous Fractal Design CPU Coolers.
The front side of the box features a color overview photo of the cooler with the fans preinstalled, on the top right corner there is the name of the product while on the left we have the Fractal Design logo and name.


The sides of the box feature a monochrome diagram of the radiator and its dimensions alongside the model number of the product and the supported sockets.


The back of the box presents the main components of the CPU block and pump assembly. Here the integrated PWM fan control system is described as well as the warranty period.



The product comes with the following accessories:
– 1x User’s manual
– 1x AMD mounting clip
– 1x Intel mounting clip
– 1x Intel backplate
– 2x Stick-on wire clips
– 8x Washers
– 8x M3 radiator screws
– 8x M3 short radiator screws
– 4x Screw pillars
– 4x Intel 2011 screw pillars
– 4x Updated AMD screw pillars for AM4
– 4x AMD screw pillars
– 4x Phillips head nuts



Model: Celsius S24
Supported sockets:
Intel: 1150, 1151, 1155, 1156, 1366, 2011, 2011-v3, 2066 (via included 2011-v3 kit),
AMD: AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+, TR4 (via included bracket in AMD Threadripper box)
Pump Bearing: Ceramic bearing and shaft
Maximum pressure, 50°CL: 1m H2O | 1.45 PSI
Input voltage: 12 V DC
Input current (without fans): 0.15 A
Rated input power (with fans): 6.6W
MTTF: >50,000 hours
Tube length: 400 mm
Fans included: 2 pcs
Model: Fractal Design Dynamic X2 GP-12 PWM
Dimensions: 120 mm x 120 mm x 25 mm
Fan Speed: 500-2000 RPM
Fan Airflow: 87.6 CFM
Fan Noise: 32.2 dB(A)
Maximum static pressure: 2.30 mm H2O
Radiator dimensions: 284 x 122 x 31 mm
Radiator materials: Aluminum
Warranty: 5 years


– The Celsius series uses a combination of cutting edge technology and premium sound dampening materials to deliver extreme cooling performance with minimum noise output.
– An intelligent temperature-controlled auto mode adjusts fan and pump speeds in real-time for optimum balance of cooling performance and silence, while PWM mode enables precision manual tuning for any usage situation.
– Included Fractal Design Dynamic X2 PWM fans offer a wide speed adjustment range from 500 to 2000 RPM allowing for near silent operation under lighter loads and maximum airflow during heavy usage.
– An integrated fan hub with concealed cable routing simplifies cable management for a clean installation.
– Radiator fittings use standard G 1/4″ thread for maximum compatibility and expandability with standard do-it-yourself components. Easily add and integrate a GPU block of your choice to eliminate noisy graphics card fans so the only sound you hear is the sound of your game.


Visual inspection

The Fractal Design Celsius S24 as a minimalist design with an all-black color scheme and sleeved tubes. The liquid cooler is based on the latest Asetek system and features a pump with a maximum pressure of 1.45 PSI and a 240mm aluminum radiator. The two 120mm fans used by this cooler are Dynamic X2 GP-12 made by Fractal Design.


The CPU Block and pump assembly is reduced in size having a height of just 33mm and features the Fractal Design snowflake embossed into the glossy surface of the top. The pump is powered by a single 4-Pin Molex connector and also features a rotating bezel that doubles as a switch for changing the operating mode.


The rotating bezel is in fact a switch labeled on the right side of the CPU block, it has two modes, Auto and PWM. The Auto mode controls both the pump speed and the connected fans based on the CPU temperature registered. The PWM mode allows the user to control both the pump speed and the fan speed.


The base of the cooler is made out of copper and is polished in a circular pattern, the baseplate is held in place by 8 metallic screws. Thermal compound is pre-applied on the base of the cooler.


The Celsius S24 uses two sleeved tubes with a total length of 400 mm, these are using a standard outer diameter being compatible with G 1/4″ fittings. The tubes and fittings are removable at the radiator connection.


The radiator used for the Celsius S24 has a length of 154mm, a width of 120mm and a height of 31mm, it also features an all-aluminum construction and a FPI count of 21. The radiator also connects to the water block through two standard G 1/4″ fittings and thus the whole system is expandable.


The integrated fan hub of the cooler is mounted in between the two ports of the radiator, it has three 4-Pin Molex headers, one being already taken by the connector that powers the whole hub.


The two fans included with the cooler are part of the Dynamic X2 series from Fractal Design, these fans have a minimum speed of 500 RPM and a maximum speed of 2000 RPM. In addition, the Dynamic X2 fans are PWM compatible and thus can be controlled either by the included hub of the cooler or by the motherboard. The cable of the fans is completely black but is not sleeved.



The following system was used to test the cooler:
– Processor: Intel i5 6600K @ 3.9 GHz and overclocked to 4.5 GHz
– Motherboard: ASRock Fatal1ty Z270 Professional Gaming i7
– RAM: Ballistix Tactical Tracer 16GB DDR4 @ 2666MHz
– GPU: GeForce GTX 1070 Founder’s Edition
– SSD: Samsung 840 EVO 120GB
– HDD: WD 1 TB Blue
– PSU: SeaSonic Snow Silent 750W
– Case: Phanteks Enthoo Luxe White
– Thermal compound: Arctic Cooling MX-4


Software used for testing the cooler:
– AIDA64 Extreme Version: 5.98.4800 (9/19/2018)
– Intel Burn Test v2.54
– Prime95 29.1

The cooler was tested with the CPU at the default turbo frequency of 3.9 GHz and overclocked to 4.5 GHz with a core voltage of 1.296 V.
Also, the included fans have been used at their maximum speed.
The room temperature was approximately 26°C (78°F), with 2°C margin of error.
The idle test consists of the CPU sitting idle at the desktop for 30 minutes, the temperature was measured at the end of the test.
The settings of the software used are the following:
Intel Burn Test v2.54 – Stress level: Maximum
Prime95 29.1- small FFT
AIDA64 Extreme Version – Temperature monitoring.
Each test was conducted for 40 minutes.




Full Load


The noise level was measured at three different distances from the fans (10cm, 20cm, 30cm.) the noise was measured with a margin of error of ± 5 db.


Final thoughts

The Fractal Design Celsius S24 has a subtle design with a good cooling performance and great build quality.

One of the features of this CPU cooler is the Auto and PWM operating modes, in PWM both the fans and the pump are controlled by the motherboard and thus are louder. The Auto mode is oriented towards silent operation rather than performance, the fans and pump are not used at their maximum speeds to achieve a lower noise. The fact that these modes are available and can be changed out of the box without any software is a great added feature to the overall package.

The build quality is great, the tubes are sleeved and the integrated fan hub allows for a clean route for the fan cables. In addition, the cable of the pump is already routed under the sleeving of one of the tubes to minimalize the cable clutter.

The Celsius S24 is also marketed as an expandable liquid cooler, however only two out of the four fittings can actually be removed, only the fittings placed on the radiator are not only removable but the standard G 1/4″ thread. In addition, user should be warned that expanding the Celsius S24 means voiding the manufacturer’s warranty, as Warranty stickers are placed over the thread of the G 1/4″ fittings.

In conclusion, the Fractal Design Celsius S24 offers a good cooling performance while being silent in the Auto mode. The build quality is very good, the CPU block and pump assembly has a small footprint and the tubes while sleeved are flexible and easy to work with.

The overall experience offered by this CPU cooler is good performance and silent operation at a flick of a switch. The integrated fan hub also allows for neat cable management and the included fans are of good quality.

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