We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black 120mm copper radiator 30mm thick G1/4 ports

Alphacool

Alphacool NexXxos ST30 Full Copper Radiator 120 30mm 14156

SKU CH-KV2S-94CXW

A 120 mm full-copper radiator with G1/4 ports, 30 mm thick and 469 g, built for custom water-cooling loops

  • TypeRadiator

Size 120mm

Struck-through versions exist but are not stocked here.

  • Full copper construction improves thermal transfer
  • 30 mm slim profile fits tight chassis spaces
  • 120 mm fan compatibility simplifies loop planning
  • Dual G1/4 ports enable flexible tubing routes
  • 469 g lightweight design eases mounting stress

Alphacool NexXxos ST30 120mm Radiator

This full copper radiator is built for custom water cooling loops where thermal performance matters. Its copper chambers, fins and channels handle coolant flow without the mixed metals found in many alternatives. The 30mm thickness fits standard 120mm fan mounts while keeping the loop compact.

Thermals, noise and power draw

Heat moves through the all copper core to the fins where attached fans do the work. Fan choice decides the noise level; the radiator itself adds no sound. No pump or electricity is required at the radiator, so system power draw is unaffected by this component.

G1/4 thread compatibility

Two G1/4 ports accept standard fittings used in most DIY loops. Builders using different thread sizes or proprietary quick connects will need adapters before installation. The brass threads resist stripping during repeated assembly.

Highlights

  • Full copper construction improves thermal transfer
  • 30 mm slim profile fits tight chassis spaces
  • 120 mm fan compatibility simplifies loop planning
  • Dual G1/4 ports enable flexible tubing routes
  • 469 g lightweight design eases mounting stress

Specifications

TypeRadiator

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I install the Alphacool NexXxos ST30 120 radiator and which step is often missed?

Mount the 157 x 124 x 30mm radiator using 120mm fan screws, then connect tubing to both G1/4" ports; the step often missed is flushing the copper chambers and fins before first use to remove manufacturing residue.

What maintenance will the copper chambers and brass threads need later?

Inspect the two G1/4" brass threads and copper chambers annually for corrosion or leaks; flush with distilled water if coolant degrades, and replace only if physical damage or persistent leakage appears.

What limit appears first on the 30mm thick copper fins during sustained load?

The 30mm fin stack and 469g copper mass saturate heat capacity first, so coolant temperature rises steadily once the full-copper chambers and channels can no longer shed heat faster than the load generates it.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.