Alphacool
Alphacool NexXxoS XT45 Full Copper 1260mm SuperNova Radiator
Best extreme cooling solution for high-end custom PC enthusiasts.
Elevate your PC's cooling with the Alphacool NexXxoS XT45 SuperNova Radiator. This 1260mm powerhouse is constructed entirely from copper for superior heat dissipation, featuring a low 12 FPI fin density that balances excellent airflow with quiet operation. Its generous cooling surface is ideal for high-end custom water cooling loops. The radiator offers flexible mounting options for up to nine 140mm or four 200mm fans and includes three G1/4 ports for seamless integration into your build.
$281.99
Owner Satisfaction
4.6
/ 5
Category Rank
528
/ 3605
#528 in Computer System Cooling Parts
Price vs Category Average
+87%
Above average
Dimensions (L x W x H)
44142248
/ x x mm
Who it's for
- Performance enthusiasts prioritizing maximum thermal conductivity and long-term durability
- Extreme overclockers pushing multi-GPU systems to their thermal limits
- Custom loop builders needing flexible routing and maintenance options
Who should skip it
- Standard PC users lacking space for massive external mounting
- Silent PC enthusiasts sensitive to high fan noise levels
- Budget-conscious builders or those with weight-sensitive chassis designs
Performance breakdown
Thermal Dissipation Capacity
Massive surface area handles extreme heat loads with effortless efficiency.
Build Material Quality
Full copper construction ensures maximum thermal conductivity and long-term durability.
Acoustic Performance
Low fin density allows for quiet operation even at lower fan speeds.
Installation Versatility
Flexible mounting options accommodate diverse fan configurations for custom loop builds.
Passive Cooling Potential
Removable mounts enable silent, fanless operation for specialized high-end systems.
Loop Integration
Triple port configuration simplifies complex routing in high-performance water cooling loops.
Key Specs
Dimensions (L x W x H)
441 x 422 x 48 mm
Net Weight
4225 g
Material
Full Copper (fins, water channels, end chambers)
Fin Density
12 FPI (Fins Per Inch)
Fan Support
9x 140mm or 4x 200mm
Radiator Size
1260mm
Port Configuration
Three G1/4 threads
Features
- Maximum heat dissipation with full copper build
- Optimized airflow for quiet cooling
- Massive 1260mm cooling surface area
- Versatile fan mounting options
- Removable fan mounts for passive cooling
- Designed for high-performance custom loops
- Flexible port configuration
What customers say
Enthusiasts highly regard the Alphacool NexXxoS XT45 1260mm SuperNova Radiator for extreme thermal management. Its full copper construction is consistently praised for superior quality and excellent thermal conductivity, justifying the investment for serious builders seeking maximum cooling capacity. Users value the balanced 45mm thickness, which provides ample surface area without requiring extremely high static pressure fans. The multiple G1/4 inch ports also allow for flexible and clean custom loop routing. While its large size presents logistical challenges for case compatibility, the overall consensus confirms this radiator offers exceptional thermal headroom and long term reliability for demanding systems.
Know before you buy
Yes, the SuperNova is designed with removable fan mounts, allowing you to run it passively. Its massive surface area and low fin density make it capable of dissipating significant heat without active airflow, provided your system load is managed appropriately.
The radiator is highly versatile, supporting either nine 140mm fans or four 200mm fans. This allows you to choose between high-static pressure setups or larger, slower-spinning fans for a quieter acoustic profile.
Because the fins, channels, and chambers are all made of copper, you avoid the risk of galvanic corrosion that can occur when mixing different metals in a loop. However, you should still use a high-quality coolant with anti-corrosive inhibitors to maintain the longevity of the radiator and your other components.
A lower fin density of 12 FPI reduces air resistance, meaning you don't need high-RPM fans to push air through the radiator. This design is specifically optimized to provide excellent thermal dissipation even when fans are running at lower, quieter speeds.
Due to its substantial 441 x 422 mm footprint, this radiator will not fit inside standard PC cases. It is intended for external mounting, custom-built enclosures, or open-frame test benches where there is sufficient space to accommodate its size.
The three G1/4 ports provide extra flexibility for your tubing runs, making it easier to route your loop without tight bends or restrictive adapters. You can use the extra port as a convenient drain point or to integrate a temperature sensor directly into the radiator.
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$282