Fractal Design Celsius+ S24 Prisma


The following system was used to test the cooler:
– Processor: Intel i9 9900K @ 5GHz
– Motherboard: ASRock Z390 Phantom Gaming X
– RAM: Ballistix Tactical Tracer 16GB DDR4 @ 2666MHz
– GPU: MSI GeForce RTX 2070 Super Gaming X Trio
– SSD: Crucial MX500
– HDD: WD 1 TB Blue
– PSU: Seasonic Snow Silent 750W Platinum
– Case: Phanteks Enthoo Luxe White
– Thermal compound: Noctua NT-H2


Software used for testing the cooler:

– AIDA64 Extreme Version: 6.25.5400
– Intel Burn Test v2.54
– Prime95 29.1

The cooler was tested with the CPU at the default turbo frequency of 4.9 GHz and overclocked to 5 GHz with a core voltage of 1.261 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 – FPU Benchmark & Temperature monitoring.
Each test was conducted for 40 minutes.




Full Load – IntelBurnTestV2


Full Load – AIDA64 CPU, FPU & Cache


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 ± 2 db.


Final thoughts

The Fractal Design Celsius+ S24 Prisma is available for approximately 160 USD or EUR, being the cheaper unit from the Prisma lineup.
The performance of the cooler is very good, having a temperature lower than other high-end CPU coolers, such as the NH-D15 from Noctua or the previous Celsius models.

The two speed modes for the pump are easy to use and offer a choice, either a low noise output with a higher overall temperature, or a higher noise output with a lower temperature.
In AUTO mode, the temperature increases by an average of 6 degrees Celsius. While the cooler running in PWM mode reached a maximum temperature of 82 degrees Celsius, in AUTO mode it reached 88 degrees Celsius.

The pump creates audible noise when running in PWM mode, however it is completely silent in AUTO mode.
The build quality is very good, the sleeving of the tubing is flawless, and the pump assembly is solid.

The installation process is very simple, the mounting system used is the same system featured on most if not all Asetek based CPU coolers. The inconvenience with this mounting system is the backplate, which not only is it made from plastic, but it has a thin structure which allows flexing.

The two 120mm fans which are part of the Prisma series, are good, with rubber pads on the corners to dampen the vibration, and addressable RGB LEDs integrated into the hub.

In conclusion, the Fractal Design Celsius+ S24 Prisma is a very good CPU cooler, that blends both the elegance characteristic of Fractal Design, and the new addressable RGB system. The performance is great and the two modes of operation for the pump, offers complete control over both the pump and the fans.
The only inconvenience will be the high price, and the noise of the pump when running in PWM mode.

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