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Black copper radiator with steel side panels, three 140mm fan mounts, G1/4 ports

Alphacool

Alphacool NexXxos ST30 X-Flow 420 140mm Triple Black 30mm

SKU CH-77D4-180Z9

Full-copper radiator with 16 FPI, X-Flow chambers and four G1/4 ports for triple 140 mm fans

  • TypeRadiator

Size 420mm

Struck-through versions exist but are not stocked here.

  • Full-copper chambers, fins and channels maximise thermal transfer
  • X-Flow design supports high coolant flow rates
  • 16 fins per inch increase surface area for efficient heat dissipation
  • 477 x 144 x 30 mm footprint fits triple 140 mm fan mounts
  • Four G1/4 ports give flexible loop routing options

Alphacool NexXxos ST30 X-Flow 420 Radiator

This full-copper radiator measures 477 x 144 x 30 mm and fits three 140 mm fans. Copper chambers, channels and fins are paired with brass G1/4 threads and steel side panels. The 16 fins-per-inch design targets high-flow custom loops.

Builders planning a triple-fan 420 mm loop

The X-Flow layout suits custom-loop builders who want a 420 mm radiator with four G1/4 ports and a 30 mm thickness. Systems limited to dual-fan mounts, thinner profiles or different port spacing will need another solution.

30 mm thickness with 16 FPI copper core

The 30 mm depth and 16 fins per inch across full copper chambers and channels determine thermal capacity and flow resistance. Match this specification to your pump and fan curve before buying.

Highlights

  • Full-copper chambers, fins and channels maximise thermal transfer
  • X-Flow design supports high coolant flow rates
  • 16 fins per inch increase surface area for efficient heat dissipation
  • 477 x 144 x 30 mm footprint fits triple 140 mm fan mounts
  • Four G1/4 ports give flexible loop routing options

Specifications

TypeRadiator

Other versions of this model

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Questions about this item

How many G1/4 ports does the radiator have and what do they limit?

Four G1/4 threads are provided; they set the maximum fitting size and thread standard you can use for tubing connections.

What are the exact case clearances needed for the 420 mm triple-fan radiator?

The unit measures 477 mm long, 144 mm wide and 30 mm thick, so the chassis must accommodate those external dimensions plus fan depth.

Which way should coolant flow through the X-Flow chambers during installation?

Connect the inlet to one end tank and the outlet to the opposite end tank so coolant crosses the full copper chamber length.

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