EK-Quantum Surface X240M - Black
Best high-performance radiator for enthusiasts building custom liquid cooling loops.
Maximize your custom water cooling loop's thermal potential with the EK-Quantum Surface X420M radiator in sleek black. Engineered for enthusiasts demanding peak performance, this 58mm thick radiator offers superior cooling capabilities. Personalize your build with optional custom powder coating for end and side pieces, or add a unique touch with UV printing. Designed for high-performance setups, it's a crucial component for achieving optimal system temperatures and pushing the limits of your hardware.
$169.99
Owner Satisfaction
4.5
/ 5
Category Rank
866
/ 3605
#866 in Computer System Cooling Parts
Price vs Category Average
+13%
Above average
Series
X Series
/ X Series
Who it's for
- Silent PC enthusiasts prioritizing quiet operation without sacrificing cooling efficiency
- Overclockers seeking maximum heat dissipation for high-end components
- Custom loop builders needing versatile port configurations for complex builds
Who should skip it
- Noise-sensitive users wanting to avoid high-speed, loud cooling fans
- Users with compact cases lacking sufficient internal clearance
- Budget-conscious builders looking for cost-effective cooling solutions
Performance breakdown
Thermal Dissipation
Massive 58mm thickness provides exceptional heat exchange for demanding custom loops.
Build Robustness
Premium materials ensure long-term durability under high-pressure water cooling conditions.
Aesthetic Versatility
Custom powder coating and UV printing options allow for unique visual integration.
Installation Complexity
Significant physical footprint requires careful planning for case compatibility and clearance.
Airflow Efficiency
Optimized fin density balances heat transfer with manageable fan speed requirements.
Loop Compatibility
Standardized fittings ensure seamless integration into most high-end custom cooling setups.
Key Specs
Series
X Series
Thickness
58mm
Radiator Size
420mm
Cooling Method
Watercooling
Model Number
EK-QTM-SURF-X420M-BK
Cooling Type
Custom Loop Component
Radiator Length
420.0 mm
Features
- Maximum cooling power with 58mm thickness
- Customizable with powder coating options
- Personalize with optional UV printing
- Designed for high-performance custom loops
- Part of the EK-Quantum Surface series
- Superior thermal dissipation
What customers say
Customers highly regard the EK Quantum Surface X240M for its exceptional build quality and superior thermal performance. The solid construction, flawless finish, and premium materials instill confidence in its longevity. Despite being a medium thickness radiator, its cooling capabilities consistently exceed expectations across various fan speeds, making it versatile for silent or high-performance systems. The clean design integrates beautifully into high-end builds. While the premium price point is noted, this component is viewed as an investment piece. It is strongly recommended for enthusiasts prioritizing uncompromising aesthetics, reliability, and peak cooling performance in their custom loops.
Know before you buy
The X420M is a thick radiator at 58mm, so you must ensure your case has sufficient clearance for both the radiator and your chosen fans. Always check your case manufacturer's specifications for radiator support, specifically looking for 'thick' or 'push-pull' compatibility to avoid interference with your motherboard or RAM.
Because of its 58mm thickness, this radiator performs exceptionally well with high-static pressure fans. While a standard push or pull configuration is sufficient for most builds, a push-pull setup will maximize the thermal dissipation potential of the X-series core.
Yes, the radiator includes the necessary mounting screws for both the radiator itself and for standard 25mm thick fans. If you plan on using fans of a different thickness, you may need to source alternative screw lengths.
No, the EK-Quantum Surface X420M uses copper fins and brass chambers. Mixing it with aluminum components will cause galvanic corrosion, which can permanently damage your cooling loop.
The optional powder coating for the end and side pieces is purely aesthetic and does not impact the thermal performance of the radiator core. It is a great way to color-match your build without compromising the cooling efficiency of the fins.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$170