Koelblok Aqua-Computer 33705 — aluminium/koper/roestvrij staal, 320×140×40 mm, grijs/zilver

The Aqua-Computer 33705 radiator block is a compact, multi-material cooling component designed for custom PC liquid-cooling loops. Combining aluminium, copper and stainless steel in a 320×140×40 mm form factor with a grey/silver finish, this radiator block provides corrosion-resistant structural elements, copper-based heat transfer surfaces and durable sealing interfaces. The airplex radical series construction avoids welding inside the coolant channels so the coolant contacts only seals, Delrin, copper and stainless steel, while the radiator frame and chromated rear create a robust, compact unit suitable for desktop systems requiring efficient heat dissipation.

Advantages

The radiator's mixed-material design balances thermal performance and structural durability: copper sections enable effective heat transfer while stainless steel and aluminium contribute stiffness and resistance to mechanical stress. The airplex radical manufacturing approach eliminates internal welding residues, reducing contamination risk in the coolant circuit. Threaded nickel-plated brass inserts simplify fan alignment and create deeper, more secure threads that lower the chance of damage from overly long screws. Slide rails with locking notches allow reversible placement of inserts and support easy installation and maintenance.

Suitable for

• Custom desktop liquid-cooling loops in gaming or workstation PCs
• Systems needing a compact 320×140×40 mm radiator for tight case layouts
• Builds where corrosion resistance and clean coolant paths are priorities

Key specifications

• Construction materials: aluminium, copper, stainless steel (internal coolant contact limited to seals, Delrin, copper and stainless steel)
• External finish: grey/silver with chromated dark-gray rear
• Dimensions (L×W×H): 320 × 140 × 40 mm
• Airplex radical series design with no internal welding
• Threaded nickel-plated brass fan inserts for improved alignment and deeper threads; inserts included for one side, additional inserts sold separately
• Slide rails with locking notches for insert placement and reversible installation
• Compact radiator frame for efficient fin-to-external-dimension ratio

How to use

Install the radiator into your PC case in a location that supports the 320×140×40 mm footprint and provides appropriate airflow. Fit the included threaded brass inserts into the slide rails on one side; if fans will be used, orient the inserts so they protrude into the fan mounting holes to automatically align fans to the threads. When installing fans, use screws of appropriate length to avoid contact with fins and tubes; if the radiator is mounted without fans, flip the inserts for a nearly flat surface to reduce any gap to the case. Connect the radiator to your loop using compatible fittings and hoses, ensuring all seals are seated and leak-tested prior to normal operation.

Recommendations

Use corrosion-inhibiting coolant compatible with copper and stainless steel, follow standard leak-test procedures after installation, and select fan screws that do not exceed the recommended length to prevent fin or tube damage. Consider acquiring additional brass inserts if you plan to mount fans on both sides or need different mounting orientations.