Fractal Design Kelvin S24 Review

Published by Marc Büchel on 10.04.15
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With the Kelvin S24, Fractal Design has a first all-in-one watercooler in its portfolio. In this case you can get an AiO with 240 millimeter copper radiator and two PWM fans for just 135 Euro. This makes us hope for lots and lots of cooling performance and overall we're more than just curious too see whether Fractal Design is capable of convincing us already with their first product in this market segment.

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Fractal Design is famous especially for making great cases and next to that the manufacturer also has fans and power supplies in its portfolio. Lately the Swedish Company decided to add a Complete series of all-in-one watercoolers to their line-up. We've already reviewed the S36 with triple radiator and today we're having a look at their Kelvin S24. This particular model features a 240 millimeter radiator made by Alphacool. Actually this is a full copper radiator and checking the dimensions it measures 275 mm in lenght and it's 30 mm thick. 30 millimeter actually makes this a "slim" radiator, which brings the benefit, that you Can install it in almost any Case, which supports 240 millimeter radiators. A closer look at the CPU Water Block reveals that it's also been milled from Copper. Overall this AIO is well made and it comes with nice and clean looks. The bundle includes two 120 mm PWM fans with white wings and black frame. Mounting system supports most, if not all, recent Intel and AMD socket CPUs.
The Kelvin series is actually Fractal Design's first liquid Cooler and the Pump, radiator as well as CPU water block are made by Alphacool.


As you can see from the picture, manufacturing quality of the Kelvin S24 is on the level it should be. It's not exceptional but still on good level for a 117 Euro all-in-one cooler with dual radiator. The latter actually measures 25 x 30 mm and is made from copper. The tubes are fitted with anti-kink coils to avoid too tight bending angles. In the water block we find a pump with ceramic bearing as well as a copper base plate and on top of that the pump is adjustable via the PWM signal. The fans included in the delivery feature the typical Fractal Design colors, which are black and white. Furthermore they measure 120 x 25 mm and rotation speeds are between 800 and 1700 rpm. Maximum airflow is advertised at 62.4 CFM.



Kelvin S24

Type AIO WaterCooler
Dimensions 275 x 124 x 30 mm (LxBxW)
Weight 1.2 kg
Provided Fan(s) 2 x 120 x 25 mm PWM
Supported Fan(s) 4 x 120 mm
Base Material Copper
Radiator Material Copper
Socket Support Intel LGA 1150, 1155, 1156, LGA 1366, 2011
AMD AM2(+), AM3(+), FM1, FM2, FM2+
Thermal Compound Zero Thermal Paste 1g syringe
Product Page Kelvin S24


The packaging is standard for an all-in-one water cooler. Alongside the AIO unit you get two fans, a manual and mounting kits. Fractal Design bundles the Kelvin S24 with two mounting kits, one for AMD and one for Intel-based systems, as well as two backplates for both AMD and Intel sockets. The manufacturer also includes a syringe containing 1 gramm of  thermal Compound, which is enough for multiple application. Als in the delivery there is a PWM splitter cable, which is always a useful thing to have. Furthermore this all-in-one cooler is compatible with almost any socket from Intel and AMD. If anything should break down with the Kelvin S24 AIO water Cooler you get a warranty that covers such event for two years.

Page 1 - Presentation / Specifications
Page 2 - Photo Gallery
Page 3 - Installation
Page 4 - Test Setup
Page 5 - Absolute Performance
Page 6 - PWM Performance
Page 7 - Conclusion

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Fractal Design Kelvin S24 Review - Cooling Watercooling - Reviews - ocaholic