Alphacool
Alphacool NexXxoS ST20 HPE Full Copper 360mm Radiator
Best slim radiator for compact custom liquid cooling builds.
Elevate your PC's cooling with the Alphacool NexXxoS ST20 HPE Full Copper 360mm Radiator. Engineered for custom liquid cooling loops, its all-copper construction ensures superior heat dissipation. This high-performance radiator is ideal for small form factor builds, featuring dual IN/OUT ports and a dedicated fill/drain port for simplified installation and maintenance, eliminating the need for a separate reservoir. Experience enhanced thermal management with increased water throughput and 20% more efficient heat transfer compared to standard models. All necessary mounting hardware is included for a seamless setup.
$132.99
Owner Satisfaction
4.6
/ 5
Category Rank
632
/ 3605
#632 in Computer System Cooling Parts
Price vs Category Average
-12%
Below average
Material
Full Copper
/ Full Copper
Who it's for
- Performance enthusiasts seeking maximum heat dissipation efficiency
- System builders working with compact or space-constrained PC cases
- Silent PC users prioritizing quiet, low-RPM fan operation
Who should skip it
- Budget-conscious builders looking for cost-effective cooling solutions
- Users wanting flexibility with standard, low-pressure case fans
- Owners preferring low-maintenance hardware with minimal cleaning needs
Performance breakdown
Thermal Efficiency
Copper construction delivers a significant boost in heat dissipation capacity.
Form Factor Compatibility
Ultra-slim profile fits seamlessly into tight small form factor builds.
Maintenance Ease
Dedicated fill and drain ports simplify loop upkeep and air bleeding.
Flow Throughput
Optimized internal structure ensures high water flow for consistent cooling performance.
Build Quality
Full copper construction provides robust durability and long-term thermal reliability.
Installation Versatility
Standard G1/4 threads and included hardware make integration straightforward for builders.
Key Specs
Material
Full Copper
Cooling Type
Custom Loop Component
Connection Threads
G1/4"
Radiator Size
360mm
Performance
1.2x increased water throughput
Performance
20% more efficient heat transfer
Internal Structure
100% Copper
Ports
Two IN/OUT, one Fill/Drain
Features
- Superior cooling with full copper construction
- Optimized for small form factor builds
- Dual ports simplify filling and bleeding
- Dedicated fill/drain port for easy maintenance
- Enhanced water throughput for better performance
- 20% more efficient heat transfer
- Includes all mounting hardware
What customers say
Customers highly value the Alphacool NexXxoS ST20 HPE 360mm Radiator for its exceptional performance within a slim profile. The full copper construction is consistently praised for delivering superior thermal transfer capabilities. This High Performance Edition unit effectively rivals thicker radiators, especially when paired with appropriate high static pressure fans. Reviewers appreciate the flexible design featuring multiple ports for easy loop routing. The main consideration is that achieving peak cooling requires higher fan speeds, which impacts noise levels due to its compact nature. Overall, this radiator is seen as a premium, high-quality solution that expertly balances small dimensions with outstanding cooling power for its category.
Know before you buy
The ST20 HPE is designed with a thinner profile specifically for space-constrained builds while utilizing a high-performance internal structure. It offers 20% more efficient heat transfer and increased water throughput compared to standard models, allowing for better cooling in a compact form factor.
Yes. The inclusion of a dedicated fill/drain port allows you to fill and bleed your loop directly through the radiator, which is particularly helpful for small form factor builds where space for a reservoir is limited.
Yes, the radiator uses industry-standard G1/4" threads. This ensures compatibility with the vast majority of custom liquid cooling fittings and tubing currently on the market.
Yes, the entire internal structure, including the fins, channels, and chambers, is constructed from copper. This maximizes thermal conductivity and helps prevent galvanic corrosion when used with other copper or nickel-plated components.
The radiator comes with all the necessary screws required to mount the unit to your chassis and to attach your 120mm fans. You will not need to purchase additional mounting hardware for a standard installation.
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$133