Radiator EKWB — brass/copper/stainless steel white 145×325×44 mm

EKWB radiator model 3831109839331 is a liquid-cooling radiator for PC custom loops, constructed from brass, copper and stainless steel with a white semi-matte finish. Measuring 145 × 325 × 44 mm and weighing 1.46 kg, this Surface P series radiator features a core built for improved thermal transfer and low flow restriction. The radiator includes five G1/4" threaded ports (four on the main body and one on the end-tank) to simplify loop routing, filling and draining. Its internal layout comprises eighteen 2 mm copper tubes and high-grade non-louvered copper fins at 18 FPI, enabling efficient heat dissipation even at low fan speeds. The unit is compatible with standard 140 mm fans of 25 mm thickness and ships with M4 screws and hex keys for installation.

Advantages

The EK-Quantum Surface P radiator delivers higher core-to-core performance compared with the predecessor model through an optimized fin structure and improved core design, resulting in up to approximately 10% better thermal performance. Low coolant flow restriction reduces load on typical single-pump setups, while 18 FPI fins and eighteen copper tubes balance airflow resistance and heat transfer to perform efficiently at low fan RPM. Semi-matte painted stainless-steel side plates and extruded aluminum end caps provide mechanical rigidity and a consistent aesthetic, and the modular multiport design offers flexible port configuration for neat tube routing and convenient draining or air bleeding.

Suitable for (tasks / use cases)

• Custom PC water-cooling loops for CPU and GPU thermal management
• High-performance builds where low-noise fan operation is required
• Multi-radiator loops using a single D5 or DDC pump
• Modding or case-matched white aesthetic setups

Key specifications

• Dimensions: 145 × 325 × 44 mm
• Weight: 1.46 kg
• Materials: brass, copper, stainless steel, extruded aluminum end caps
• Core layout: eighteen 2 mm copper tubes across the core
• Fin density: 18 FPI, non-louvered copper fins with matte coating
• Ports: five G1/4" threaded connection ports (four on main body, one on end-tank)
• Fan compatibility: standard 140 mm fans, 25 mm thickness
• Finish: semi-matte white side plates with black matte fins

How to use

Mount the radiator in a compatible case or radiator bracket using the supplied M4 screws; use the M4x30 mm screws for 25 mm fans and the M4x5 mm screws for direct case mounting. Configure tubing and fittings to the preferred G1/4" ports for optimal routing, leaving the end-tank port accessible for draining and air bleeding. When installing fans, consider a push, pull, or push/pull arrangement to increase airflow and cooling capacity. Follow standard liquid-cooling best practices when filling and priming the loop, ensuring all fittings are tightened to avoid leaks and that the system is bled of trapped air before full operation.

Recommendations

Use fans with sealed-edge frames and appropriate static pressure for radiator use; operating at lower RPMs will benefit from the 18 FPI fin density while keeping noise levels down. For multi-radiator setups, pair with a pump capable of overcoming minor system restriction (D5 or DDC recommended). When modding or painting, disassemble following the modular design instructions and avoid overtightening screws into the core to prevent fin damage; if replacement screws are used, ensure they are compatible with M4 threading.