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Alphacool NexXxoS XT45 full copper 420mm radiator with three 140mm fan slots

Alphacool

Alphacool NexXxoS XT45 Full Copper X-Flow 420mm Radiator

SKU CH-TN3M-GDN5F

Full-copper 420 mm radiator with X-Flow chambers and three 140 mm fan slots for high-flow liquid cooling

  • Radiator size420 mm
  • Fan size3 Fan Slots (140 mm)
  • Product typeRadiator

Size 420mm

  • Full copper construction improves thermal transfer
  • 420 mm length fits three 140 mm fans
  • X-Flow design supports high coolant flow rates
  • 45 mm thickness increases cooling surface area
  • Includes mounting hardware and two screw plugs

Alphacool NexXxoS XT45 420 mm Radiator

The Alphacool NexXxoS XT45 is a full-copper water-cooling radiator built for custom loops. Its chambers, fins and channels are all made from copper to improve thermal transfer. The X-Flow internal structure is designed for high flow rates. It fits three 140 mm fans in a 420 mm length.

Suits high-flow custom loops; not for tight spaces

This radiator suits builders who want a full-copper heat exchanger with an X-Flow layout for unrestricted coolant movement. It is not for cases that cannot accommodate a 420 mm radiator or three 140 mm fan slots. Buyers needing a smaller footprint should look at shorter models.

420 mm length with three 140 mm fan slots

The decisive specification is the 420 mm radiator size combined with three 140 mm fan slots. This dimension determines whether the unit fits your chassis and matches your planned fan configuration. Verify case clearance before purchase.

How it compares

Measured against everything we stock in Liquid Cooling & AIO Coolers, at today’s prices. Recalculated every night.

Price $107.99
Pricier than about 67% of the 1,190 comparable items (median $71.99).
Radiator size 420 mm
Higher than about 93% of the 165 comparable items (median 360 mm).

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Specifications

Product
Product typeRadiator
Size & build
Radiator size420 mm
Fan size3 Fan Slots (140 mm)

Other versions of this model

5 more in the same range

Questions about this item

What G1/4 thread standard do the X-Flow ports follow, and what flow rate does it cap in practice?

The X-Flow radiator uses standard G1/4 threads; the bevelled chamber design removes internal restrictions so flow is limited only by your pump and tubing, not by the radiator itself.

What case clearance and fan mounting pattern does the 420 mm XT45 require?

It needs 420 mm of straight rail space plus 45 mm thickness, and accepts three 140 mm fans on 140 mm centres with the included mounting hardware.

How do the two screw plugs supplied with the XT45 install, and which port do builders often leave open by mistake?

Fit one plug into each unused chamber port with a G1/4 wrench; the most common error is forgetting the second plug on the opposite end, leaving a leak path.

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