Thermaltake Pacific CL420 Cooling Radiator

Experience premium liquid cooling with the Thermaltake Pacific CL420 Cooling Radiator, a purpose-built 420mm copper radiator engineered to deliver exceptional thermal performance in high-demand systems. Featuring a dense copper fin design and a robust brass end tank, this radiator is built to pair with 140mm high-static pressure fans for maximum airflow through tight fin arrays. Designed for enthusiasts who demand consistent cooling, quiet operation, and long-term reliability, the CL420 brings a premium, performance-driven solution to gaming rigs, workstations, and overclocked builds while maintaining a refined, industrial aesthetic.

• Performance-driven design: The CL420 leverages a high-density copper fin array to maximize heat transfer, increasing surface area for rapid cooling as coolant travels through the core. The copper fins, optimized channel geometry, and brass end tanks reduce thermal resistance and ensure efficient coolant flow from inlet to outlet. When paired with 140mm high-static pressure fans, the radiator delivers superior static pressure and airflow performance, enabling cooler CPU and GPU temperatures even under heavy workloads. This results in a more stable overclock, cooler boost clocks, and improved end-user comfort in long gaming sessions or extended rendering tasks, all while maintaining a relatively quiet acoustic profile due to efficient heat dissipation.
• Compatibility and versatility: At 420mm in length, the CL420 is designed to fit a wide range of modern cases that support large radiators. It supports flexible mounting options including push/pull configurations to squeeze every drop of performance from your loop, or a simpler single-vent setup when space is limited. Its design is optimized for 140mm high-static pressure fans frequently used in premium builds, ensuring strong airflow through dense fin packs without excessive noise. The radiator is compatible with standard water-cooling components, making it straightforward to integrate into existing loops with common tubing and fittings, and it can be combined with GPUs, CPUs, or custom loop layouts for unified thermal management.
• Build quality and durability: Crafted from premium materials, the Pacific CL420 emphasizes long-term reliability. Copper fins provide outstanding thermal conductivity, while brass end tanks enhance durability and resistance to deformation under clamp forces. The robust construction delivers excellent leak resistance and structural stability, retaining performance over years of operation in diverse environmental conditions. This combination of materials is designed to stand up to frequent maintenance cycles and demanding cooling scenarios, giving builders confidence that their investment will deliver consistent results through multiple hardware generations.
• Aesthetics and cooling efficiency: The CL420’s copper-brass aesthetic offers a premium, industry-inspired look that complements modern glass-side PC builds and custom loops. Beyond visuals, the copper fin array and brass tanks support efficient heat transfer, enabling lower coolant temperatures with modest pump effort. The end result is a cooler system, reduced thermal throttling, and quieter active cooling during gaming marathons or compute-intensive workflows. The radiator’s engineering prioritizes both form and function, delivering a visually striking component that also contributes tangible performance gains.
• Installation and maintenance: Designed with user-friendly integration in mind, the CL420 uses standard radiator mounting patterns compatible with most 420mm spaces. It supports common water-cooling configurations and fittings, allowing for straightforward tube routing and secure connections. For optimal longevity, pair the radiator with corrosion-resistant coolant and perform routine maintenance such as checking fittings and periodically flushing the loop. With proper bleed procedures and leak testing before powering the system, you can enjoy reliable operation and sustained cooling efficiency across long sessions and hardware upgrades.

Technical Details of Thermaltake Pacific CL420 Cooling Radiator

• Length: 420 mm
• Core material: Copper fins
• End tanks: Brass
• Fin density: High-density copper fins
• Fan compatibility: Designed for 140 mm high-static pressure fans
• Fittings: Standard water-cooling fittings (G1/4" threads commonly used)
• Application: Ideal for custom water-cooling loops in gaming PCs and workstations
• Configuration: Suitable for push/pull or single-fan configurations depending on case space

how to install Thermaltake Pacific CL420 Cooling Radiator

• Prepare your case by confirming a 420mm radiator mounting area and space for fans in your chosen configuration (push/pull or single-fan).
• Mount the radiator to the chassis using the provided screws, ensuring the fins have unobstructed airflow and that there is adequate clearance for tubing routing.
• Attach 140 mm high-static pressure fans to the radiator in your preferred setup, securing them firmly and connecting to a PWM hub or motherboard header as needed.
• Install compatible fittings (G1/4" standard) and route tubing to your CPU and GPU blocks, ensuring tight seals and secure clamps to prevent leaks.
• Fill the loop with coolant, bleed all air from the system, and perform a leak test before powering on. Verify pump operation and monitor temperatures during initial burn-in to ensure stable performance.

Frequently asked questions

• Q: Is the Thermaltake Pacific CL420 compatible with 140mm high-static pressure fans? A: Yes, the CL420 is specifically designed to work with 140mm high-static pressure fans to maximize airflow through the dense copper fins.
• Q: What is the radiator length? A: The CL420 measures 420 mm in length, making it suitable for cases that support large radiators.
• Q: What materials are used in construction? A: The radiator uses copper fins and brass end tanks for enhanced thermal performance and durability.
• Q: Can I use it in a push/pull configuration? A: Yes, the CL420 supports push/pull or single-fan configurations depending on your case space and cooling needs.
• Q: Is it suitable for high-load gaming or workstation workloads? A: Yes, the CL420 is designed to deliver robust cooling performance for demanding CPUs and GPUs in extended sessions, helping maintain stable temperatures and consistent performance.