Award-winning NF-A4x10 design
Having received more than 50 awards and recommendations
from the international press, Noctua’s NF-A4x10 has
become a proven premium choice for 40mm cooling needs.
Its renowned efficiency has convinced tens of thousands
of customers all over the world.
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Reduced motor hub size
Thanks to its streamlined, compact motor design, the
NF-A4x10's motor hub is smaller than with conventional
4cm fans. This allows for more blade surface area and
thus contributes to the NF-A4x10's superior airflow and
pressure performance.
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Flow Acceleration Channels
The NF-A4x10 impeller features suction side Flow
Acceleration Channels. By speeding up the airflow at the
crucial outer blade regions, this measure reduces
suction side flow separation and thus leads to better
efficiency and lower vortex noise.
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AAO frame
Noctua's AAO (Advanced Acoustic Optimisation) frames
feature integrated anti-vibration pads as well as
Noctua's proprietary Stepped Inlet Design and Inner
Surface Microstructures, both of which further refine
the fan's performance/noise efficiency.
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Stepped Inlet Design
Noctua's Stepped Inlet Design adds turbulence to the
influx in order to facilitate the transition from
laminar flow to turbulent flow, which reduces tonal
intake noise, improves flow attachment and increases
suction capacity, especially in space-restricted
environments.
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Inner Surface Microstructures
With the tips of the fan blades ploughing through the
boundary layer created by the Inner Surface
Microstructures, flow separation from the suction side
of the blades is significantly suppressed, which results
in reduced blade passing noise and improved airflow and
pressure efficiency.
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Integrated Anti-Vibration Pads
Integrated Anti-Vibration Pads made from extra-soft
silicone minimise the transmission of minute vibrations
while maintaining full compatibility with all standard
mounting systems and fan clips used on heatsinks.
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Custom-designed PWM IC with SCD
Supporting fully automatic PWM speed control, the
NF-A4x10 PWM uses Noctua's novel, custom-designed NE-FD1
PWM IC that integrates Smooth Commutation Drive (SCD)
technology. By providing smoother torque impulses, SCD
suppresses PWM switching noises and thus makes the fan
quieter at lower speeds.
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Stops at 0% PWM
When the fan is set to 0% PWM duty cycle by the
motherboard or PWM fan controller, it will stop. This
makes it ideal for creating setups with semi-passive
cooling that automatically turn the fans off and thus
run completely silent at idle if thermals allow.
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SSO2 Bearing
The NF-A4x10 features the further optimised second
generation of Noctua's renowned, time-tested SSO
bearing. With SSO2, the rear magnet is placed closer to
the axis to provide even better stabilisation, precision
and durability.
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Low-Noise Adaptor
The NF-A4x10 PWM is supplied with a Low-Noise Adaptor
(L.N.A.) that reduces the maximum fan speed from 5000 to
3700rpm. The L.N.A. can be used either to run the fan at
a fixed speed of 3700rpm or to cap the maximum speed
when using automatic PWM control.
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OmniJoin™ Adaptor Set
Many devices featuring 40mm fans use proprietary fan
headers, so the NF-A4x10 comes with Noctua's OmniJoin™
adaptor set. Just cut the original fan's cable, fix it
to the adaptor using the supplied 3M Scotchlok™
connectors and you can plug the NF-A4x10 to proprietary
fan headers!
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Extensive cabling options
The fan's short 20cm primary cable minimises cable
clutter in typical applications while the supplied 30cm
extension provides extended reach when necessary. Both
cables are fully sleeved and a 4-pin y-cable allows the
connection of a second fan to the same PWM fan header
for automatic control.
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6-year manufacturer’s warranty
Noctua fans are renowned for their impeccable quality
and outstanding longevity. Like all Noctua fans, the
NF-A4x10 features an MTTF of more than 150.000 hours
rating and comes with a full 6-year manufacturer's
warranty.
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