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Grey 120 mm square case fan with nine blades and black frame

Noctua

Noctua NF-S12B redux-700 120 mm case fan 700 RPM

SKU CH-NCHE-ZES5V MPN NF-S12B redux-700

120 mm case fan spins at 700 RPM for 56,9 m³/h airflow at 6,8 dB(A) with SSO bearing and >150.000 h MTBF

  • Fan size120 × 120 × 25 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing designSSO
  • Rotational speed700 RPM
  • Near-silent 6.8 dB(A) at 700 RPM
  • Airflow-optimised blades deliver 569 m³/h
  • SSO bearing rated beyond 150000 hours
  • Proven NF-S12B design with 100+ awards
  • Streamlined redux edition keeps essential Noctua quality

Ultra-Quiet 120 mm Case Fan

The Noctua NF-S12B redux-700 is a 120 mm case fan built for silent operation. It runs at a fixed 700 RPM and produces a noise level of 6.8 dB(A). The airflow-optimised blade design delivers 56,9 m³/h for efficient chassis ventilation. It uses a 3-pin connector and an SSO bearing rated for over 150,000 hours MTBF.

Ideal for Noise-Sensitive Builds

This fan suits builders who prioritise near-silent case cooling above maximum airflow. The low speed makes it virtually inaudible in typical systems. It is not for users who need high static pressure for restrictive radiators or dense heatsinks. Buyers requiring PWM speed control or higher airflow for hot components should consider other options.

700 RPM Fixed Speed

The defining specification is the fixed 700 RPM speed. This single figure determines the ultra-low noise output and the airflow capacity for low-impedance case cooling. It confirms the fan cannot spin faster under load. Check that your motherboard or fan controller supports 3-pin voltage regulation if you plan to lower the speed further.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 85% of the 8,339 comparable items (median $19.99).

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Specifications

Product
Brand nameNoctua
Model nameNF-S12B redux-700
Product typeCase Fan
Product colorGrey
Performance
Rotational speed700 RPM
Airflow rate56,9 m³/h
Power
Power input connector3 Pin
Size & build
Fan size120 × 120 × 25 mm
Number of fans1 Fan
Fan depth25 mm
Bearing designSSO
Shipping weight0.22 kg
Package size178 × 173 × 36 mm
Environment & compliance
Operating noise6,8 dB(A)
More details
Fan controlNo Controller

Questions about this item

Should I choose the 700 RPM model or a faster variant for my build?

The 700 RPM version delivers 56,9 m³/h airflow at 6,8 dB(A). Select it when silence is the priority and case airflow resistance is low; pick a higher-RPM model only if you need more airflow and can accept extra noise.

What does 56,9 m³/h airflow mean inside my case?

At 700 RPM the fan moves 56,9 m³/h through an open chassis. In a typical case with filters and components the actual flow will be lower, but the blade design is optimised for low-impedance ventilation rather than high static pressure.

How does the 3-pin connector limit speed control?

The 3-pin Molex connector allows voltage-based speed regulation only. Your motherboard or a fan controller can lower the voltage below 12 V to reduce RPM further, but PWM signals are not supported.

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