Alphacool NexXxoS ST25 Full Copper Alternatives: 6 Similar Picks Compared
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The Alphacool NexXxoS ST25 240mm radiator stands out for its all-copper construction. Every internal component, including the end chambers, water channels, and cooling fins, is made of pure copper. This design provides a reliable foundation for custom liquid cooling loops. You might look for alphacool nexxxos st25 full copper alternatives if you need different dimensions or port configurations. Some builders require thinner profiles for tight cases, while others need more plumbing flexibility. You may also prefer a different size or fan mount option to fit your specific chassis layout.
We selected these picks because their published specifications overlap with the original product. The list includes other 240mm copper radiators with varying depths and port counts. You will find options with six G1/4-inch ports for flexible tubing routing. There are also choices with reduced thickness for compact builds. Some entries offer single-fan configurations for small form factor cases. Each alternative shares the all-copper material trait. This ensures consistent thermal performance across different physical footprints. You can compare the exact dimensions and weights to find the best fit for your system.
Our top pick: Alphacool NexXxoS ST25 240mm Copper Radiator.
How each alternative compares
Alphacool NexXxos 240mm Full Copper Radiator
This model shares the all-copper construction of the ST25 but offers a different internal layout. It features six G1/4-inch ports, giving you more flexibility for tubing routing compared to the standard configuration. The 46mm depth provides expanded internal volume, which can help with heat dissipation in dense builds. You should consider this option if your chassis allows for the extra depth and you need versatile plumbing options. It maintains the reliable copper core design but prioritizes connection variety over the ultra-slim profile of the original.
Alphacool NexXxos XT45 X-Flow 240mm Copper Radiator
The XT45 X-Flow version increases the thickness to 45mm, offering more internal volume for cooling. It retains the all-copper core and includes six G1/4-inch ports for flexible tubing placement. This extra depth allows for better airflow management if your case has the space. You will gain cooling potential and routing options, but you must ensure your chassis can accommodate the increased length and thickness. It is a stronger choice for performance-focused loops where space constraints are less critical than the original ST25 model.
Alphacool NexXxos UT60 120mm Copper Radiator
This radiator reduces the size to a single 120mm fan mount, making it suitable for smaller cases or lower heat loads. It keeps the all-copper construction for consistent thermal performance in a compact form factor. You lose the dual-fan surface area of the 240mm ST25, so it is not ideal for high-performance gaming rigs. Choose this if you have limited space or do not need maximum cooling headroom. It provides reliable copper cooling in a smaller footprint, sacrificing raw dissipation capacity for physical compatibility with compact builds.
Alphacool NexXxos ST30 240mm Copper Radiator
The ST30 model offers an all-copper core in a 30mm profile, which is slightly thicker than the 25mm ST25. This extra 5mm provides more internal volume for heat exchange while remaining very compact. You gain a bit more cooling capacity and structural rigidity, but you must check that your chassis has the clearance for the additional thickness. It is a practical alternative if you need a slim radiator but want slightly more core depth. The copper construction remains consistent, ensuring similar material benefits with a minor size adjustment.
Alphacool NexXxoS XT45 40mm Copper Radiator
This 40mm radiator is designed for extreme space constraints, such as small form factor builds. It uses the same all-copper construction but in a much smaller package. You sacrifice significant cooling surface area and fan count, making it suitable only for low heat output components. Choose this if you have strict space limits and cannot fit a standard 120mm or 240mm radiator. It provides essential cooling in tight spots where the original ST25 simply will not fit, prioritizing physical compatibility over thermal performance.
Alphacool NexXxoS XT45 92mm Copper Radiator
The 92mm version fits standard 92mm fan mounts, offering an alternative when 120mm space is unavailable. It maintains the all-copper core and provides a 60mm thickness for adequate internal volume. You trade the larger surface area of the 240mm ST25 for compatibility with smaller fan mounts. This is a good option for compact builds or older chassis designs that only support 92mm fans. It delivers reliable copper cooling in a specialized form factor, ensuring you can use high-quality materials even with non-standard mounting constraints.
Quick picks
Our 7 picks
Alphacool NexXxoS ST25 240mm Copper Radiator
Best for: all-copper 240mm custom loop builds
- Radiator Size
- 240mm
- Material
- Copper, brass, stainless steel
- Thread Size
- G1/4
- Dimensions
- 2.36 × 4.72 × 4.72 inches
- Weight
- 1.75 pounds
View on Amazon: Alphacool NexXxoS ST25 240mm Copper Radiator Affiliate link
You get an all-copper 240mm slim radiator designed for custom liquid cooling loops. Alphacool uses pure copper across the end chambers, water channels, and cooling fins to maximize heat transfer. Measuring 4.72 inches wide, 4.72 inches high, and 2.36 inches long, this unit weighs 1.75 pounds in a black finish. It fits your build if you need full-copper construction in a dual-fan 240mm footprint without mixing metals in your system.
Pros
- Pure copper end chambers, water channels, and cooling fins
- Standard 240mm radiator size for dual-fan configurations
- Lightweight build at 1.75 pounds
- Available in alternative 120mm and 360mm sizes
Cons
- Only available in a black finish
- Package does not list included mounting hardware or fittings
Good fit if
- You need a 240mm radiator built completely from copper.
- You want a black radiator weighing under two pounds for your loop.
Skip if
- You need a radiator color other than black.
- You require a larger 360mm radiator format for your chassis.
Verdict: Alphacool NexXxoS ST25 240mm Copper Radiator delivers an all-copper build across the channels, fins, and chambers for standard dual-fan loops. Its 1.75-pound weight and compact profile make it a reliable foundation for copper-based liquid cooling.
Alphacool NexXxos 240mm Full Copper Radiator
Best for: custom loops needing flexible port routing
- Radiator Size
- 240mm
- Material
- Copper
- Thread Size
- G1/4
- Dimensions
- 4.88 × 11 × 1.81 inches
- Weight
- 1.32 pounds
View on Amazon: Alphacool NexXxos 240mm Full Copper Radiator Affiliate link
The Alphacool NexXxos XT45 240mm Copper Radiator is a dual-fan heat exchanger measuring 280 by 124 by 46 millimeters. It features copper cooling channels, fins, and chambers paired with brass threads and steel side panels. With six standard G1/4-inch ports, it gives you flexible routing options for tubing and drain valves. This model suits you if you need a mid-thickness radiator that balances port options with standard 120mm dual-fan case mounts.
Pros
- Six G1/4-inch connection ports
- Copper cooling channels, fins, and water chambers
- Steel side panels for structural rigidity
- Standard dual 120mm fan form factor
Cons
- Thickness of 46mm requires more chassis clearance than slim models
- Dry weight reaches 1,199g before adding fluid
Good fit if
- You need multiple G1/4-inch ports for flexible loop routing or dedicated drain points.
- You have chassis clearance for a 46mm thick radiator plus fans.
- You use a cooling setup designed for two 120mm fans.
Skip if
- You require an ultra-slim radiator thinner than 46mm.
- You need mounting designed for 140mm fan locations.
Verdict: Alphacool NexXxos XT45 240mm Copper Radiator delivers versatile plumbing options with six G1/4-inch ports and an all-copper internal channel design. Its 46mm depth provides expanded internal volume for standard dual 120mm fan chassis mounts.
Alphacool NexXxos XT45 X-Flow 240mm Copper Radiator
Best for: custom loops requiring flexible X-Flow port placement
- Radiator Size
- 240mm
- Material
- Copper
- Thread Size
- G1/4
- Fan Mount
- Dual Fan
- Dimensions
- 11.5 × 4.88 × 1.77 inches
- Weight
- 1.03 kilograms
View on Amazon: Alphacool NexXxos XT45 X-Flow 240mm Copper Radiator Affiliate link
The Alphacool NexXxoS XT45 X-Flow 240mm Radiator is a dual-fan heat exchanger built with copper channels, fins, and chambers. At 45mm thick, it provides more depth than slim alternatives, while its X-Flow cross-flow design pairs with six G1/4-inch ports for flexible routing. If you have 293mm of clearance and need multiple port positions across both ends, this unit fits your custom loop configuration.
Pros
- Full copper channels, fins, and water chambers
- Six G1/4" threaded connection ports
- 45mm thickness for increased cooling volume
- X-Flow design enables straight-through tube routing
Cons
- At 45mm thick, it requires more chassis clearance than slim radiators
- Total length of 293mm exceeds standard non-X-Flow 240mm dimensions
Good fit if
- You need six G1/4" port options across both ends of the radiator.
- You have at least 45mm of depth and 293mm of length in your case.
- You want an all-copper core including channels, fins, and chambers.
Skip if
- You are building in a compact case restricted to slim sub-30mm radiators.
- You prefer ports placed exclusively on a single end of the unit.
Verdict: Alphacool NexXxoS XT45 X-Flow 240mm Radiator provides an all-copper 45mm-thick core and six G1/4" ports, making it a versatile choice when your chassis allows extra depth and length.
Alphacool NexXxos UT60 120mm Copper Radiator
Best for: Small cases with low heat output
- Radiator Size
- 120mm
- Material
- Copper
- Thread Size
- G1/4
- Fan Mount
- Single Fan
- Dimensions
- 4.72 × 4.72 × 2.76 inches
- Weight
- 1.76 pounds
View on Amazon: Alphacool NexXxos UT60 120mm Copper Radiator Affiliate link
The Alphacool NexXxoS UT60 is a single-fan, 120mm radiator with a black steel exterior and full copper internals. It weighs 1,004g and measures 157 x 124 x 60mm. This compact unit suits builds where space is tight. You get six G1/4" ports for flexible tubing routing. It offers a slim profile compared to the thicker 30mm or 45mm alternatives on this list.
Pros
- Full copper chambers, fins, and channels for efficient heat transfer.
- Six G1/4" ports provide flexible connection options.
- Slim 60mm height saves space in small cases.
- Black steel side panels match dark builds.
Cons
- Single-fan design limits cooling capacity for high-end CPUs.
- Smaller surface area compared to 240mm or 360mm alternatives.
- Heavier than plastic-core radiators at 1,004g.
Good fit if
- You need a compact radiator for a small form-factor case.
- You are building a low-to-mid heat output system.
- You prefer a black aesthetic with copper internals.
Skip if
- You require high cooling performance for overclocked CPUs.
- You need a dual-fan 240mm or larger setup.
- You want a lighter radiator for easy handling.
Verdict: The Alphacool NexXxoS UT60 120mm Single Fan fits users with limited space who need reliable cooling for modest heat loads. It is not suitable for high-performance gaming rigs requiring maximum thermal headroom.
Alphacool NexXxos ST30 240mm Copper Radiator
Best for: compact builds with 30mm radiator clearance
- Radiator Size
- 240mm
- Material
- Copper
- Thread Size
- G1/4
- Fan Mount
- Dual Fan
- Dimensions
- 4.88 × 10.9 × 1.18 inches
- Weight
- 1.49 pounds
View on Amazon: Alphacool NexXxos ST30 240mm Copper Radiator Affiliate link
This is a 240mm dual-fan radiator built for custom cooling loops. It features a slim 30mm thickness, measuring 278 x 125 x 30mm, along with an all-copper internal design across its chambers, fins, and channels. Two standard G1/4-inch ports handle your coolant connections, while steel side panels add frame rigidity. You will find it suits compact computer builds that can accommodate slightly more clearance than ultra-slim 25mm radiators.
Pros
- Copper cooling channels, fins, and water chambers
- Slim 30mm profile fits space-limited cases
- Brass connection threads with steel side panels
Cons
- Limited to two G1/4-inch ports
- Thicker than 25mm ultra-slim alternatives
Good fit if
- You have 30mm of clearance for a 240mm radiator mount.
- You want an all-copper core across the chambers, fins, and channels.
Skip if
- You need a strict 25mm or thinner profile to avoid component collisions.
- You require multi-port options for complex loop routing.
Verdict: Alphacool NexXxoS ST30 240mm Copper Radiator delivers an all-copper core inside a compact 30mm profile. It works well if your chassis has space for 5mm more thickness than an ST25.
Alphacool NexXxoS XT45 40mm Copper Radiator
Best for: small form factor builds
- Radiator Size
- 40mm
- Material
- Copper, steel housing
- Dimensions
- 5.79 × 1.57 × 1.61 inches
- Weight
- 0.34 kilograms
View on Amazon: Alphacool NexXxoS XT45 40mm Copper Radiator Affiliate link
This is a 40mm thick, full copper radiator designed for high-density cooling. It measures 5.79 inches long, 1.57 inches wide, and weighs 0.34 kilograms. The black finish matches standard system aesthetics. You should consider this unit if you need a compact heat exchanger for tight spaces. It offers a dense fin stack suitable for small form factor builds or specialized loop configurations.
Pros
- Full copper construction for efficient heat transfer
- Ultra-slim 40mm profile saves space
- Compact dimensions fit small cases
- Black finish matches standard components
Cons
- Very low thickness limits total cooling capacity
- Small surface area restricts airflow efficiency
- Single fan size requires specific mounting
Good fit if
- You are building a small form factor PC
- You need a compact auxiliary radiator
- You have limited depth in your case
Skip if
- You require high airflow for overclocking
- You need a standard 120mm or 240mm size
- You want maximum cooling performance
Verdict: Alphacool NexXxoS XT45 40mm Copper Radiator is a specialized heat exchanger for builders with strict space constraints. It fits users who prioritize compactness over raw cooling power in small chassis.
Alphacool NexXxoS XT45 92mm Copper Radiator
Best for: compact builds limited to 92mm fan mounts
- Radiator Size
- 92mm
- Material
- Copper
- Thread Size
- G1/4
- Dimensions
- 3.94 × 3.94 × 2.36 inches
- Weight
- 15.9 ounces
View on Amazon: Alphacool NexXxoS XT45 92mm Copper Radiator Affiliate link
This is a compact 92mm single-fan radiator built from copper with a black finish. It measures 3.94 inches long, 3.94 inches wide, and 2.36 inches tall, weighing 15.9 ounces. If you build custom liquid loops inside small cases that lack room for standard 120mm mounts, this gives you full copper construction in a sub-100mm format. You get targeted cooling in spots where larger alternatives cannot physically fit.
Pros
- Full copper material construction
- Compact 92mm single-fan footprint
- Relatively light 15.9-ounce weight
- Black finish matches standard chassis interiors
Cons
- Small 92mm size provides less surface area than 120mm or 240mm radiators
- Thicker 2.36-inch height requires sufficient clearance around tight fan mounts
Good fit if
- You need a radiator for a chassis with only 92mm fan locations.
- You want an all-copper radiator for your liquid loop.
- You have at least 2.36 inches of clearance for radiator thickness.
Skip if
- You have mounting space for standard 120mm or 240mm radiators.
- You need a slim profile under 2.36 inches thick.
Verdict: Alphacool NexXxoS XT45 92mm Copper Radiator delivers full copper construction in a compact 92mm form factor for space-restricted builds. Its 2.36-inch thickness provides solid cooling volume when standard 120mm radiator mounts are unavailable.
Specifications side by side
| Spec | Alphacool NexXxoS ST25 240mm Copper Radiator | Alphacool NexXxos 240mm Full Copper Radiator | Alphacool NexXxos XT45 X-Flow 240mm Copper Radiator | Alphacool NexXxos UT60 120mm Copper Radiator | Alphacool NexXxos ST30 240mm Copper Radiator | Alphacool NexXxoS XT45 40mm Copper Radiator | Alphacool NexXxoS XT45 92mm Copper Radiator |
|---|---|---|---|---|---|---|---|
| Radiator Size | 240mm | 240mm | 240mm | 120mm | 240mm | 40mm | 92mm |
| Material | Copper, brass, stainless steel | Copper | Copper | Copper | Copper | Copper, steel housing | Copper |
| Thread Size | G1/4 | G1/4 | G1/4 | G1/4 | G1/4 | not stated | G1/4 |
| Fan Mount | not stated | not stated | Dual Fan | Single Fan | Dual Fan | not stated | not stated |
| Size | 240Mm | 240Mm | 240Mm | 120Mm | 240Mm | 40mm | 92mm |
| Dimensions | 2.36 × 4.72 × 4.72 inches | 4.88 × 11 × 1.81 inches | 11.5 × 4.88 × 1.77 inches | 4.72 × 4.72 × 2.76 inches | 4.88 × 10.9 × 1.18 inches | 5.79 × 1.57 × 1.61 inches | 3.94 × 3.94 × 2.36 inches |
| Weight | 1.75 pounds | 1.32 pounds | 1.03 kilograms | 1.76 pounds | 1.49 pounds | 0.34 kilograms | 15.9 ounces |
| Color | Black | black | Black | Black | - Black | Black | Black |
| Model | 14250 | 14164 | 14234 | 14172 | 14157 | 14210 | 14226 |
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Frequently asked questions
What is the thinnest all-copper Alphacool radiator available?
The ST30 is the thinnest option at 30mm. It features an all-copper core in a compact profile. This model works well if your chassis has space for 5mm more thickness than the ST25. It provides reliable cooling without requiring deep mounting areas.
Which Alphacool copper radiator fits small form factor builds?
The XT45 40mm Copper Radiator is designed for strict space constraints. It serves as a specialized heat exchanger for builders prioritizing compactness over raw cooling power. This small size fits users who need minimal footprint solutions in small chassis environments.
Does the ST25 have flexible port routing options?
The ST25 offers a standard configuration for dual-fan loops. For flexible port routing, the NexXxos XT45 provides six G1/4-inch ports. This design allows versatile plumbing options compared to the standard layout found in the ST25 model for custom loop builds.
Is there a single fan all-copper Alphacool option?
The UT60 120mm Single Fan is a copper radiator for limited space. It fits users needing reliable cooling for modest heat loads. This model is not suitable for high-performance gaming rigs requiring maximum thermal headroom in single fan configurations.
How much does the ST25 240mm weigh?
The ST25 240mm weighs 1.75 pounds. Its compact profile and solid copper construction make it a reliable foundation for standard dual-fan loops. The weight reflects the dense all-copper build across channels, fins, and chambers for consistent thermal performance.
Can I use a 92mm fan with an all-copper Alphacool radiator?
Yes, the XT45 92mm Copper Radiator supports 92mm fans. It delivers full copper construction in a compact form factor for space-restricted builds. The 2.36-inch thickness provides solid cooling volume when standard 120mm radiator mounts are unavailable for your setup.