Alphacool NexXxoS ST30 X-Flow 120mm Full Copper Radiator 14228

Alphacool NexXxoS ST30 120mm Radiator

The Alphacool NexXxoS ST30 is a full-copper water-cooling radiator built for custom-loop builders who want maximum thermal conductivity from every component. Its chambers, channels and fins are all copper, removing the brass or aluminium bottlenecks found in conventional designs. The X-Flow internal structure is engineered for high flow rates, making it suitable for loops with multiple blocks or restrictive components. This 120mm unit fits single-fan mounting points in compact or full-size cases.

Full copper construction and X-Flow layout

Every primary part of the heat exchanger uses copper, so coolant contacts a uniform metal surface from inlet to outlet. The bevelled chamber design reduces turbulence and pressure drop, letting pumps maintain velocity through dense fin stacks. Two screw plugs and a full mounting hardware kit are included, so the radiator can be pressure-tested and secured without extra purchases. Standard G1/4 threads accept any common fitting angle or diameter.

Verify loop compatibility before ordering

Confirm that your case offers a 120mm mounting location with enough clearance for fan thickness and fitting protrusion. Ensure your pump can deliver the flow rate the X-Flow design expects, especially if the loop already contains CPU and GPU blocks. Check that your tubing and fittings match G1/4 threads and that you have space to route lines to the radiator ports without sharp bends. The package contains only the radiator, plugs and screws; fans and coolant are separate.