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Black 360 mm copper radiator with aluminium end caps, 58 mm thick

EK

EK Quantum Surface X280M 3831109838853 360 mm radiator

SKU CH-HVNA-0BT0R MPN 3831109838853

A 360 mm copper radiator with a 58 mm thick core, sixteen 2 mm tubes and 18 FPI fins for high heat dissipation in custom loops

  • TypeRadiator
  • Block Dim.12.8 L x 5.71 W x 2.28 H inches
  • Block MaterialCopper
  • Display3831109838853 EK
  • Pump Dim.12.8 L x 5.71 W x 2.28 H inches
  • Radiator Size360 mm
  • 58 mm thick core delivers maximum cooling capacity in the Quantum Surface range
  • Sixteen 2 mm copper tubes maintain unrestricted coolant flow through the loop
  • 18 FPI non-louvered copper fins balance heat transfer with low air resistance
  • Four G1/4 ports plus dedicated drain port simplify loop planning and bleeding
  • Modular end-cap plugs let you reconfigure tube routing for a cleaner build

EK Quantum Surface X280M 360 mm radiator

The EK Quantum Surface X280M is a 360 mm copper radiator designed for custom liquid-cooling loops. Its 58 mm thickness and sixteen 2 mm copper tubes target enthusiasts who need maximum thermal capacity for high-heat components.

Practical limits of the 58 mm thick core

The dense 18 FPI fin structure demands medium to high-speed fans or a push-pull configuration to move sufficient air through the restrictive core. Slow-running fans cannot extract enough heat, so the radiator will underperform without adequate airflow.

Modular end caps simplify installation

Four G1/4" ports plus a dedicated drain port on the end tank give flexible routing and easy loop bleeding. The interchangeable plugs and extenders let builders optimise tube paths, but the radiator's weight and bulk require secure mounting points and careful tube bending to avoid stress on fittings.

Highlights

  • 58 mm thick core delivers maximum cooling capacity in the Quantum Surface range
  • Sixteen 2 mm copper tubes maintain unrestricted coolant flow through the loop
  • 18 FPI non-louvered copper fins balance heat transfer with low air resistance
  • Four G1/4 ports plus dedicated drain port simplify loop planning and bleeding
  • Modular end-cap plugs let you reconfigure tube routing for a cleaner build

Specifications

BrandAlphacool
SeriesROG STRIX LC II 360
Part Number3831109838853
TypeRadiator
Block Dim.12.8 L x 5.71 W x 2.28 H inches
Block MaterialCopper
Display3831109838853 EK
Pump Dim.12.8 L x 5.71 W x 2.28 H inches
Radiator Size360 mm
Radiator MaterialCopper
ColorGreen
Tube MaterialDesktop (Intel LGA, AMD AMx)
FeaturesDesktop (Intel LGA, AMD AMx)

Questions about this item

Should I pick the 280 mm or the 360 mm version?

The 360 mm radiator has a larger core area, so it handles higher heat loads when paired with medium- or high-speed fans or a push-pull configuration.

What does the 58 mm thickness mean for my loop?

It provides the highest cooling capacity in the Quantum Surface range, but requires stronger airflow to move heat out of the dense copper fin stack.

How many G1/4 ports are available for fittings and drainage?

Four standard ports plus a fifth on the end-tank dedicated to draining and air bleeding, giving flexible routing options.

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