Alphacool
NexXxoS ST30 240mm
Best slim radiator for compact custom liquid cooling builds.
The Alphacool NexXxoS ST30 Full Copper 240mm Radiator is a premium cooling component engineered for PC enthusiasts seeking high thermal performance in compact spaces. Built entirely from copper for superior heat transfer, this dual 120mm radiator features a slim 30mm thickness and a 16 FPI design, balancing cooling efficiency with quiet operation. It supports configurations up to four 120mm fans in a push/pull setup. The V.2 version enhances usability with modern end chambers and multiple G1/4-inch ports, simplifying integration and bleeding in custom water cooling loops. This radiator offers reliable cooling power wrapped in a sleek black steel frame.
$47.90
Owner Satisfaction
4.6
/ 5
Category Rank
632
/ 3605
#632 in Computer System Cooling Parts
Price vs Category Average
-68%
Below average
Material
Copper (channels, fins, pre-chambers), Steel (frame)
/ Copper (channels, fins, pre-chambers), Steel (frame)
Who it's for
- Performance seekers prioritizing maximum thermal efficiency
- System builders working within space-constrained PC cases
- Custom loop enthusiasts needing versatile tubing configurations
Who should skip it
- Overclockers pushing hardware to extreme thermal limits
- Silent PC builders sensitive to high-speed fan noise
- Beginners looking for a plug-and-play cooling solution
Performance breakdown
Thermal Conductivity
Full copper construction ensures rapid heat dissipation for demanding cooling loops.
Case Compatibility
Slim 30mm profile fits comfortably into most compact chassis configurations.
Acoustic Efficiency
The 16 FPI fin density allows for quiet operation at lower RPMs.
Loop Integration
Multiple G1/4-inch ports provide exceptional flexibility for complex custom tubing runs.
Build Quality
Robust steel frame and copper internals offer long-term structural reliability.
Maintenance Ease
Modern end chambers simplify the bleeding process for faster system setup.
Key Specs
Material
Copper (channels, fins, pre-chambers), Steel (frame)
Dimensions
278 x 124 x 30 mm (L x W x H)
Fin Density
16 FPI
Connections
5x G1/4 inch ports
Fan Support
Up to four 120mm fans (Push/Pull)
Pressure Tested
1.5 Bar
Screw Size
M3
Warranty
2 years
Features
- Full copper construction for maximum heat transfer
- Slim 30mm thickness for compact builds
- Optimized 16 FPI design for quiet cooling
- Supports push/pull fan configurations
- Multiple G1/4-inch ports for loop flexibility
- Refined V.2 aesthetic and improved port layout
- Designed for high-performance liquid cooling
What customers say
The Alphacool NexXxoS ST30 240mm radiator is highly regarded for its excellent balance of performance and compact size. Customers consistently praise its all-copper construction, which ensures superior thermal conductivity and long-term compatibility within liquid cooling loops. Its slim 30mm profile makes it an ideal choice for builds where space is limited but effective heat dissipation remains essential. Reviewers note the robust build quality and clean threading. This radiator strikes a dependable balance between size, performance, and value, making it a recommended component for both new and experienced custom loop builders seeking reliable, space-efficient cooling.
Know before you buy
The 30mm thickness is specifically designed for space-constrained builds. However, you should account for the additional depth of your fans, which will add another 25mm to the total profile.
Yes, the radiator is designed to support up to four 120mm fans in a push/pull setup. This configuration can help improve thermal performance, especially if you are using lower-RPM fans.
The NexXxoS ST30 is constructed entirely from copper, including the channels, fins, and pre-chambers. This ensures maximum heat transfer and helps prevent galvanic corrosion issues often found in mixed-metal loops.
This V.2 model features five G1/4-inch ports. These are distributed across the end chambers to provide flexible routing options and make it significantly easier to bleed air from your loop during the filling process.
The 16 FPI (fins per inch) design is a 'sweet spot' for this radiator. It provides enough surface area for effective cooling while remaining open enough to allow for quiet operation with lower-speed, low-static-pressure fans.
The radiator uses M3 threads for mounting. Ensure your fan screws are the correct length to avoid piercing the radiator core, which could cause a leak.
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