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Noctua NF-S12B redux-700, Ultra Quiet Silent Fan, 3-Pin, 700 RPM (120mm, Grey)
Noctua

Noctua NF-S12B redux-700, Ultra Quiet Silent Fan, 3-Pin, 700 RPM (120mm, Grey)

Bottom line: The Noctua NF-S12B redux-700 ($16.95 on Amazon as of 2026-10-06): 6.8 dB(A) rated noise at 700 RPM, close to silent in most rooms; main trade-off: 700 RPM top speed limits airflow under heavy GPU or CPU heat.

$16.95

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Buy on Amazon — $16.95 Compare to similar cooling & fans

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 6.8 dB(A) rated noise at 700 RPM, close to silent in most rooms
  • ✓ Standard 120x120x25mm frame fits common 120mm case fan mounts
  • ✓ Rated MTTF over 150,000 hours suits always-on systems
  • ✓ Blade design moves a lot of air for its speed in open case layouts
  • ✓ Can run even quieter at reduced voltage or with NA-SRC10 adaptors

Cons

  • ✗ 700 RPM top speed limits airflow under heavy GPU or CPU heat
  • ✗ Not suited to radiators, dense filters or tower heatsinks
  • ✗ 3-pin connection: no PWM, speed control depends on voltage
  • ✗ Redux package is minimal; mounts, splitters, extensions cost extra

Manufacturer description

The Noctua NF-S12B redux-700 is a 120mm case fan for builders who want the quietest system possible. It runs at 700 RPM and is rated at just 6.8 dB(A), so in most rooms you will not hear it over normal background noise. It measures 120x120x25mm, runs on 12V and connects with a 3-pin plug, so it fits standard 120mm fan mounts in most PC cases. Its blades are shaped to move a lot of air for how quietly it spins. That makes it a good fit for case intake and exhaust, chassis ventilation and other spots with little resistance to airflow. If you want it even quieter, you can run it at reduced…

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SpecPicks Verdict

SpecPicks scored Noctua NF-S12B redux-700 using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. Noctua's cooling & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is the Noctua NF-S12B redux-700 a PWM fan?

No. It is a 3-pin, 12V fan. You control its speed by changing the voltage, either from a motherboard header in DC mode or with the optional NA-SRC10 Low-Noise Adaptors. It does not take a PWM signal.

Can I use this fan on a radiator or CPU heatsink?

It is not the best choice for that. Noctua designed it for low-noise case cooling and chassis ventilation where there is little resistance to airflow. At 700 RPM it is a poor match for radiators, dense dust filters or tower heatsinks.

What size is the NF-S12B redux-700?

It measures 120x120x25mm, the standard size for 120mm case fans, so it fits most 120mm intake and exhaust mounts in PC cases.

How long will the fan last?

Noctua rates its MTTF (mean time to failure) at more than 150,000 hours. For current warranty coverage, check the product listing or Noctua's support site.

Does it come with anti-vibration mounts or adapters?

The redux edition is a stripped-down package. Noctua sells anti-vibration mounts, S-ATA adaptors, y-splitters, extension cables and NA-SRC10 Low-Noise Adaptors as optional extras. Check the product listing for the exact box contents.

Key Features

  • Ultra low noise fan, 120x120x25mm, 12V, 3-pin Molex, 700 RPM, 6.8 dB(A), >150,000 h MTTF
  • Renowned NF-S12B high-end 120x25mm 12V fan, more than 100 awards and recommendations from international computer hardware websites and magazines, hundreds of thousands of satisfied users
  • Airflow-optimised blade design with high CFM and outstanding quietness of operation, ideal for low-noise case cooling, chassis ventilation and other applications with low airflow resistance
  • Low-speed ultra-quiet 700rpm 3-pin version for demanding silent enthusiasts, virtually inaudible with optional NA-SRC10 Low-Noise Adaptors or at reduced voltage
  • Streamlined redux edition: proven Noctua quality at an attractive price point, wide range of optional accessories (anti-vibration mounts, S-ATA adaptors, y-splitters, extension cables, etc.)

Full Specifications

BrandNoctua
ModelNF-S12B redux-700
Voltage12 Volts
MaterialFibre-glass reinforced PBT
Dimensions120x120x25mm
Unit Count1.0 Count
Noise Level6.8 Decibels
Part NumberNF-S12B redux-700
Material TypeFibre-glass reinforced PBT
Cooling MethodAir
Number of Items1
Vibration/RumbleYes
Air Flow Capacity56.9 Cubic Meters Per Hour
Compatible DevicesDesktop
Power Connector Type3-Pin
Warranty Description6 year manufacturer’s warranty
Maximum Rotational Speed700 RPM
Item Dimensions L x W x H0.98"L x 4.72"W x 4.72"H
Global Trade Identification Number04716123315308

Ready to buy?

Noctua NF-S12B redux-700, Ultra Quiet Silent Fan, 3-Pin, 700 RPM (120mm, Grey) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $16.95

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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Noctua NF-S12B redux-700, Ultra Quiet Silent Fan, 3-Pin, 700 RPM (120mm, Grey)
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