ARCTIC 120x38mm High-Static-Pressure Server/Radiator Fan

The ARCTIC S12038-8K is a high-static-pressure 120x38 mm cooling fan built for servers, radiators and tight enclosures, delivering up to 370 m³/h airflow with durable brass-housed ball bearings.

Designed for demanding cooling tasks where space, pressure and reliability matter, the S12038-8K balances powerful airflow with a long service life. Its robust bearing assembly, flexible control options and built-in electrical protections make it suitable as a replacement or upgrade in 4U racks, CPU heatsinks, radiators and system ventilation setups.

How does the S12038-8K stay reliable under continuous use?

Longevity is a core design focus: the impeller runs on two ball bearings enclosed in a brass housing, which reduces wear from heat, dust and vibration. The fan also includes overvoltage, reverse polarity and overcurrent protection to prevent damage from electrical faults.

• Brass-housed double ball bearings for improved durability.
• Electrical protections guard against common power issues.
• Robust construction resists environmental contaminants in server environments.

What cooling performance can I expect in cramped or radiator setups?

The S12038-8K produces a high static pressure of 37 mmH2O alongside a maximum airflow of 370 m³/h, making it effective at forcing air through dense fins and tight chassis gaps. This combination helps maintain lower temperatures on heatsinks and radiators where resistance to flow is high.

• 37 mmH2O static pressure for pushing air through dense fins.
• Up to 370 m³/h airflow for strong bulk ventilation.
• 120 x 38 mm form factor fits many 4U and rack applications.

How do I control speed and connect the fan to different systems?

The fan offers a wide, controllable speed range and supports PWM for precision regulation, but it can also operate via 2-pin or 3-pin headers when necessary. A standard 4-pin connector is provided, and the 30 cm cable gives flexibility when routing inside cases or racks.

• 4-pin PWM connector for precise speed control.
• Backward-compatible with 3-pin and 2-pin headers for broad compatibility.
• 30 cm cable length eases placement in tight enclosures.

Will the S12038-8K fit my server or PC chassis and what roles does it serve?

The 120 x 38 mm size is specifically suitable for 4U server housings and works well as a radiator fan, CPU cooler upgrade or general system ventilation. Its thicker 38 mm profile increases airflow capacity and static pressure compared with slim 25 mm fans.

• Form factor compatible with many 4U and rack-mounted systems.
• Suitable as radiator fan, CPU fan replacement or rack ventilation.
• Thicker profile for improved cooling performance in constrained spaces.

Who this is for: The ARCTIC S12038-8K is aimed at system builders, IT administrators and PC enthusiasts who need reliable, high-pressure cooling in compact or dense environments. Choose it if you require a fan that combines strong static pressure, high airflow and extended durability for servers, radiators or 4U chassis upgrades.