Fractal Lumen S28 RGB AiO Liquid Cooler Review

Color-Coordinated Cooling

Fractal Lumen S28 RGB

Fractal’s new Lumen series cooler is their second liquid cooler series, but their first in-house design. We won’t get into the semantics of patent trolling and Intellectual Property defense, but it’s well known that a certain company has a stranglehold on the AiO liquid cooling market in terms of combining a pump and a water block into one device. The Lumen does NOT have a pump integrated into the water block which opens a lot of doors for design choices. Lumen comes in three sizes currently, 240mm and 360mm versions based on 120mm fan spacing, and 280mm for 140mm fan spacing.

Interestingly, the Lumen pump is integrated into the radiator, right in the middle of the cooling fins under where a fan hub will sit. This allows for a different and improved block mounting hardware compared to the previous Celsius family. It also allows a large amount of the water block volume to be dedicated to aesthetics which allows the smoke-colored seemingly opaque top to glow in addressable RGB as you see fit. The top can be rotated in 90-degree increments so that it always faces the correct way in any build. Let’s get hands-on and see how it does!


PC Test Bench would like to thank Fractal Design for sending over the TOUGHLIQUID 240 ARGB Sync All-In-One Liquid Cooler for us to check out!

Fractal’s take on the Lumen S28 RGB Cooler:

Customize your water-cooling from subtle to stunning with Lumen’s six addressable LEDs that you can command via motherboard or controller. Compatible with most common Intel/AMD sockets and RGB certified by industry standards, the Lumen is an attractive proposition for starting and seasoned builders alike.


  • Duality design provides both a stealthy and illuminated look, controlled from your motherboard RGB UI
  • Six ARGB LEDs are yours to command via your motherboard or controller
  • The removable top can be turned at 90-degree intervals, making the logotype horizontal independent of the mounting orientation
  • Pre-applied thermal paste ensures an easy installation
  • Supports the most common sockets for both Intel and AMD
  • Aspect fans for low turbulence and chaining support
  • Articulating elbow fittings make tubes easier to route and reduces tension on the cold plate housing
  • Current certifications include Asus AURA, Gigabyte Fusion, MSI Mystic Light, Razer Chroma, and ASRock Polychrome support
  • Low-permeability rubber tubes with braided nylon sleeves

Quick Specs:

  • PUMP
    • Speed : 4000 R.P.M ± 10%
    • Rated Voltage: 12 V
    • Rated Current : 0.34A
    • Bearing Type: Ceramic
    • Pump Max pressure: 1.8 mm H2O/ 17.6 kPa / 2.5 PSI
    • Material: Copper
    • Thermal Paste: Pre-applied
  • FAN
    • Dimension : 140 x 140 x 25 mm
    • Speed: 500~2000 R.P.M
    • Noise Level. : <10–35.5 dBA
    • Rated Voltage: 12 V
    • Rated Current : 0.24A
    • Air Flow. : 20-78 CFM
    • Pressure. : 0.3-2.05 mm-H2O
    • Control type: PWM
  • TUBE
    • Length: 400 mm
    • Material: Low-permeability rubber with braided-nylon sleeve
    • Dimension : 313 x 140 x 27 mm
    • Material: Aluminum
    • Intel
      • LGA 2066/2011-3/2011/1366/1200/1156/1155/1151/1150
    • AMD
      • AM4/AM3+/AM3/AM2+/AM2/FM2/FM1


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